| Subject | English | Spanish |
| gen. | a bunch of red grapes and a bunch of white grapes | un racimo de uvas rojas y un racimo de uvas blancas |
| chem. | alizarin red | rojo de alizarina |
| tech. | American nationa Red Cross | Cruz Roja Americana |
| bot. | American red mulberry | moral rojo Morus rubra |
| bot. | American red mulberry | morera roja Morus rubra |
| bot. | American red raspberry | frambueso rojo Rubus strigosus |
| chem. | antimony red | pentasulfuro de antimonio |
| agric., chem. | beetroot red | rojo de remolacha |
| agric., chem. | beetroot red | E162 |
| chem. | Berlin red | rojo Berlín |
| agric. | blue-and-red shrimp | gamba roja del Mediterráneo (Aristeus antennatus) |
| agric. | blue-and-red shrimp | gamba rosada (Aristeus antennatus(Risso,1816)) |
| gen. | Both red and green grapes are good squeezed and turned into wine or juice | Tanto las uvas rojas como las verdes son buenas exprimidas y convertidas en zumo o vino |
| chem. | to bring to red heat | calentar al rojo blanco |
| gen. | Brown hair is a common hair color, while red is quite uncommon | El pelo castaño es un color común de pelo mientras que el rojo es poco común |
| tech. | burns red flare marker burns red | la bengala de marcación es de llama roja |
| agric. | cacao-red | rojo de cacao |
| agric. | cacao red | rojo de cacao |
| chem. | cadmium red | rojo de cadmio |
| bot. | Californian red fir | abeto de California Abies magnifica |
| bot. | Canadian red pine | pino rojo de América Pinus resinosa |
| bot. | Canadian red spruce | abeto rojo Picea rubens, Picea rubra |
| bot. | Canadian red spruce | picea roja del Canadá Picea rubens, Picea rubra |
| med. | cherry-red spot | mancha roja de la mácula (en la idiotez amaurótica) |
| med. | cherry-red spot | signo de Tay |
| chem. | Chinese red | rojo chino |
| chem. | chlorophenol red | rojo de clorofenol |
| chem. | CI pigment red 57 | rubinpigment |
| chem. | CI pigment red 57 | litolrubina |
| chem. | CI pigment red 57 | litolrubina BK |
| chem. | CI pigment red 57 | carmine 6B |
| chem. | CI pigment red 57 | CI pigment red 57 |
| chem. | CI pigment red 57 | E180 |
| chem. | CI pigment red 101 and 102 | DCI pigment red 101 and 102 |
| chem. | CI pigment red 101 and 102 | CI pigment yellow 42 and 43 |
| chem. | CI pigment red 101 and 102 | CI pigment black 11 |
| chem. | CI pigment red 101 and 102 | L172 |
| chem. | CI pigment red 101 and 102 | óxidos de hierro e hidróxidos de hierro |
| chem. | C.I.Pigment Red 104 | rojo de cromato molibdato sulfato de plomo |
| chem. | Cochineal Red A | CI food red 7 |
| chem. | Cochineal Red A | E124 |
| chem. | Cochineal Red A | punzo 4R |
| chem. | Cochineal Red A | new coccine |
| chem. | cochineal red A | Ponceau 4R, rojo cochinilla A |
| chem. | Cochineal Red A | rojo cochinilla A |
| chem. | cochineal red A | E 124 |
| med. | colloid red test | prueba de Ducci |
| med. | colloid red test | prueba al rojo coloide |
| gen. | color red | color rojo |
| gen. | common red-backed mouse | ratón de campo Clethrionomys glareolus |
| agric. | common red spider | arañuela de las legumbres (Tetranychus urticae) |
| agric. | common red spider | arañuela de la patata (Tetranychus urticae) |
| chem. | Congo red | rojo Congo |
| tech., chem. | Congo-red indicator | indicador rojo Congo |
| med. | Congolian red fever | tabardillo (rat typhus) |
| med. | Congolian red fever | pinareno (rat typhus) |
| med. | Congolian red fever | fiebre de Tolón (rat typhus) |
| med. | Congolian red fever | fiebre de Méjico (rat typhus) |
| med. | Congolian red fever | tifus murino (rat typhus) |
| med. | Congolian red fever | tifus mejicano (rat typhus) |
| med. | Congolian red fever | tifus endémico benigno (rat typhus) |
| chem. | cresol red | rojo de cresol |
| agric. | dapple red | berrenda en rojo |
| chem. | derby red | pigmento de cromato de plomo |
| chem. | derby red | rojo chino |
| med. | destruction of red blood cells | hemólisis |
| bot. | dwarf red maple | arce rojo enano Acer glabrum |
| bot. | Eastern red cedar | enebro rojo de Virginia Juniperus virginiana |
| bot. | Eastern red cedar | cedro rojo de Virginia Juniperus virginiana |
| chem. | English red | rojo inglés |
| bot. | European red dogwood | cornizo Cornus sanguinea |
| agric. | European red raspberry | frambuesa |
| agric. | Florida red scale | cochinilla roja floridana (Chrysomphalus) |
| agric. | Florida red scale | cochinilla circular negra (Chrysomphalus) |
| agric. | garnet-red | rojo-granate |
| agric. | grains striated with red | granos veteados de rojo |
| agric. | hard red spring wheat | trigo duro rojo de primavera |
| agric. | hard red spring wheat | trigo de primavera hard red |
| gen. | I have a red car | tengo un coche rojo |
| chem. | Indian red | rojo de la India |
| med. | inferior syndrome of red nucleus | síndrome de Benedikt |
| med. | inferior syndrome of red nucleus | síndrome de Claude |
| chem. | infra-red | infrarroja |
| chem. | infra-red | infrarrojo |
| gen. | Infra-red Astronomical Satellite | satélite astronómico infrarrojo |
| agric., tech. | infra-red CO2-meter | calibrador de CO2 por infrarrojos |
| gen. | infra-red detection apparatus | aparatos de detección de infrarrojos |
| chem. | infra-red drier | secador infrarrojo |
| agric. | infra-red drier | desecador de rayos infrarrojos |
| tech., industr., construct. | infra-red dryer | equipo de eliminación de agua por evaporación por calor por radiación |
| gen. | infra-red dryer | secadero por rayos infrarojos |
| tech., industr., construct. | infra-red drying | secado de infrarrojos |
| tech., chem. | infra-red evaporator | evaporador de infrarrojos |
| med. | infra-red imaging | imaginería por infrarrojos |
| gen. | infra red light | faro de infrarrojos |
| chem. | infra-red radiation heating | calefacción por radiación infrarroja |
| tech., el. | infra-red reflection method | método de reflexión por infrarrojos |
| chem. | infra-red spectroscopy | espectroscopia infrarroja |
| chem. | infra-red spectrum | espectro infrarrojo |
| tech., industr., construct. | infra-red thermo-setting | equipo de fijado por radiación |
| gen. | International Agreement regarding the Maintenance of Certain Lights in the Red Sea | Convenio internacional relativo al mantenimiento de algunos faros del mar Rojo |
| obs., social.sc., health. | International Federation of Red Cross and Red Crescent Societies | Liga de Sociedades de la Cruz Roja y la Media Luna Roja |
| gen. | International Red Cross | Movimiento Internacional de la Cruz Roja y de la Media Luna Roja |
| gen. | International Red Cross | Cruz Roja Internacional |
| gen. | International Red Cross and Red Crescent Movement | Cruz Roja Internacional |
| gen. | International Red Cross and Red Crescent Movement | Movimiento Internacional de la Cruz Roja y de la Media Luna Roja |
| agric., UN | International Red Locust Control Organization for Central and Southern Africa | Organización Internacional del Africa Central y Austral para la Lucha contra la Langosta Roja |
| chem. | iron red | rosa de hierro |
| gen. | Japanese Red Army | Ejército Rojo Japonés |
| bot. | Japanese red pine | pino rojo del Japón Pinus muricata, P. densiflora |
| soil. | laterized red earths | tierras rojas laterizadas |
| chem. | lead chromate molybdate sulphate red | cromato molibdato sulfato de plomo rojo |
| obs., social.sc., health. | League of Red Cross and Red Crescent Societies | Liga de Sociedades de la Cruz Roja y la Media Luna Roja |
| obs., social.sc., health. | League of Red Cross Societies | Liga de Sociedades de la Cruz Roja y la Media Luna Roja |
| tech. | light cherry red | rojo cerezo pálido |
| mineral. | light red silver | proustita |
| chem. | lime red | rojo de cal |
| chem. | lithol red | rojo litol |
| gen. | long, red hair | pelo rojo largo |
| gen. | long stem red rose | rosa roja de tallo largo |
| chem. | lysine-iron-cystine-neutral red broth | caldo de lisina-hierro-cistina rojo neutro |
| gen. | Many people from Ireland have red hair | Mucha gente de Irlanda tiene el pelo rojo |
| chem. | methyl red | rojo de metilo |
| gen. | Miss Waldron’s red colobus | colobo rojo de Miss Waldron Procolobus badius Waldroni |
| chem. | molybdate red | anaranjado de molibdeno |
| chem. | molybdenum red | rojo de molibdeno |
| gen. | My beard hair is black, red and brown | El pelo de mi barba es negro, rojo y moreno |
| gen. | My face turns red when I am embarrassed | Mi cara se pone roja cuando estoy avergonzado |
| chem. | naphthol red | rojo de naftol |
| chem. | Neutral Red | rojo neutro |
| chem. | neutral red | rojo de toluileno |
| gen. | neutral red fluorescence test | prueba de fluorescencia del rojo neutro |
| bot. | New Zealand red beech | haya roja de Nueva Zelanda Nothofagus fusca |
| bot. | New Zealand red pine | pino rojo de Nueva Zelanda Dacrydium cupressinum |
| soil. | non-laterized red earth | tierra roja no laterítica |
| bot. | Northern red currant | grosellero rojo Ribes rubrum |
| gen. | oblique red band | banda roja oblicua |
| agric. | olive stuffed with red pepper | aceituna rellena de pimiento |
| gen. | orange and red crab | cangrejo naranja y rojo |
| agric. | other red/rosé wines | otros vinos tinto/rosado |
| chem. | para red | rojo para |
| chem. | para red | rojo de paranitroanilina |
| med. | Pearse method of oil red-O-staining of lipids | coloración de los lípidos de Pearse |
| chem. | Persian Gulf red | rojo de Persia |
| chem. | phenol red | fenolsulfoftaleína |
| chem. | phenol red | rojo de fenol |
| chem. | Pompey red | rojo pompeyano |
| chem. | post office red | rojo de correos |
| chem. | post office red | rojo de estafeta |
| gen. | pretty woman with red hair | mujer guapa con el pelo rojo |
| chem. | primuline red | rojo de primulina |
| chem. | pyrazolone red | rojo de pirazolona |
| bot. | red alder | aliso rojo americano Alnus rubra |
| bot. | red alder | aliso americano Alnus rubra |
| bot. | red algae | rodofíceas Rhodophyceae |
| gen. | red and green grapes | uvas rojas y verdes |
| agric. | red and rosé wine | vino tinto y rosado |
| chem. | red antimony | quermesita |
| gen. | red apple | manzana roja |
| gen. | red apples | manzanas rojas |
| gen. | Red Army Fraction | Fracción del Ejército Rojo |
| tech. | red ball repair | reparación urgente del avión |
| tech. | red ball repair | reparación de emergencia |
| bot. | red Baltic pine | pino de Riga Pinus sylvestris var. rigensis |
| agric. | red banana | banano color clarete Musa paradisiaca sapientum rubra |
| agric. | red banana | cambur morado |
| agric. | red banana | guineo morado Puerto Rico; Musa paradisiaca sapientum rubra |
| agric. | red banana | guineo morado (Musa paradisiaca sapientum rubra) |
| agric. | red-banded thrips | tripido de listas rojas (Selenothrips rubrocinctus) |
| agric. | red-banded thrips | trips del cacao (Selenothrips rubrocinctus) |
| bot. | red bartsia | eufrasia roja Odontites rubra |
| bot. | red bartsia | algarabía Odontites rubra |
| bot. | red beet | remolacha de mesa Beta vulgaris var. conditiva |
| bot. | red beet | remolacha comestible Beta vulgaris var. conditiva |
| bot. | red beet | remolacha hortícola Beta vulgaris var. conditiva |
| bot. | red beet | remolacha roja Beta vulgaris var. conditiva |
| agric. | red beet | remolacha (Beta vulgaris var. conditiva) |
| agric. | red beet | remolacha hortelana (Beta vulgaris var.conditiva) |
| agric. | red beet | remolacha de mesa (Beta vulgaris var. conditiva) |
| bot. | red beet | remolacha de huerta Beta vulgaris var. conditiva |
| bot. | red berried mistletoe | marojo Viscum cruciatum |
| bot. | red birch | abedul americano Betula lenta |
| bot. | red birch | abedul rojo Betula lenta |
| bot. | red birch | abedul azucarado Betula lenta |
| med. | red blood cells | glóbulos rojos |
| med. | red blood corpuscles | eritrocitos |
| med. | red blood corpuscles | glóbulos rojos |
| med. | red blood corpuscles | corpúsculos rojos de la sangre |
| med. | red blood corpuscles | hematíes |
| med. | red blood count | recuento de los hematíes |
| med. | red blood picture | fórmula eritrocítica |
| med. | red bone marrow preserved in glycerol | médula roja conservada en glicerina |
| med. | red boy syndrome | malnutrición protéica y calórica |
| med. | red boy syndrome | kwashiorkor |
| tech. | red brass | latón cobrizo |
| chem., el. | red brickwork | ladrillería roja |
| gen. | Red Brigades | Brigadas Rojas |
| agric. | red brown leaf disease | pardeado |
| agric. | red-brown spots caused by Pallaucothrips musae, Hood | manchas marrón-rojizas |
| med. | red bug | vendimiador (insecto; trombicula) |
| med. | red bug | chinche roja (trombicula) |
| bot. | red cabbage | lombarda Brassica oleracea var. capitata |
| agric. | red cabbage | repollo colorada (Brassica oleracea convar. capitata var.rubra) |
| bot. | red cabbage | repollo colorado Brassica oleracea var. capitata |
| agric. | red cabbage | lombarda (Brassica oleracea convar. capitata var.rubra) |
| gen. | red cabbage | lombardas (Brassica oleracea convar. capitata var. rubra) |
| bot. | red cedar | cedro de España Cedrela odorata |
| bot. | red cedar | cedrela americana Cedrela odorata |
| bot. | red cedar | cedro índico Cedrela toona |
| bot. | red cedar | cedro australiano Cedrela toona |
| bot. | red cedar | cedro colorado Cedrela odorata |
| bot. | red cedar | cedro de México Cedrela odorata |
| bot., mexic. | red cedar | cuche Cedrela mexicana |
| bot., Guatem. | red cedar | cedro Cedrela mexicana |
| bot. | red cedar | enebro rojo de Virginia Juniperus virginiana |
| bot. | red cedar | cedro rojo de Virginia Juniperus virginiana |
| bot. | red cedar | cedro macho Cedrela odorata |
| med. | red cell count | cuenta de glóbulos rojos |
| med. | red cell enzymopathy | eritroenzimopatía |
| biol. | red cell mass | masa eritrocítica |
| biol. | red cell mass | masa de eritrocitos |
| med. | red cell production | eritropoyesis |
| med. | red cell value | valor de glóbulos rojos |
| gen. | Red Choice Alliance | Alianza Roja |
| bot. | red cinchona | cuarango Cinchona pubescens |
| bot. | red cinchona | cascarillero Cinchona pubescens |
| bot., Venezuel. | red cinchona | quino Cinchona pubescens |
| agric. | red clover | trébol de los prados (Trifolium pratense) |
| agric. | red clover | trébol común (Trifolium pratense) |
| med. | red contracted kidney | esclerosis renal |
| med. | red contracted kidney | riñón cirrótico |
| med. | red contracted kidney | riñón granular |
| med. | red contracted kidney | cirrosis renal |
| med. | red contracted kidney | riñón contraído |
| med. | red contracted kidney | riñón atrófico |
| med. | red contracted kidney | nefroescleria |
| med. | red contracted kidney | nefroesclerosis |
| tech. | red copper | óxido rojo de cobre |
| tech. | red copper | cuprita |
| chem. | red copper ore | cuprita |
| chem. | red copper oxide | óxido rojo de cobre |
| agric. | red core of strawberry | podredumbre roja de la raíz de la frutilla (Phytophthora fragariae) |
| bot. | red cornelwood | alfitonia Alphitonia excelsa |
| med. | red corpuscles | corpúsculos rojos de la sangre |
| med. | red corpuscles | eritrocitos |
| med. | red corpuscles | glóbulos rojos |
| med. | red corpuscles | hematíes |
| gen. | red crescent emblem | emblema de la media luna roja |
| gen. | red crystal | cristal rojo |
| agric. | red currant | grosella silvestre |
| agric. | red currant | grosella común |
| agric. | red currant bush | grosellero rojo (Ribes rubrum) |
| bot. | red currant bush | grosellero rojo Ribes rubrum |
| agric. | red currant harvester | cosechadora de grosellas rojas |
| gen. | red currants Ribes rubrum | grosella roja |
| med. | red degeneration | degeneración roja |
| soil. | red desert soil | suelo rojo desértico |
| med. | red disease | mal rojo |
| tech. | red dog | ceniza roja que queda como residuo de la combustión de los desperdicios de las minas de carbón |
| gen. | red duiker | duíquero rojo Cephalophus natalensis |
| soil. | red earth | limo rojo |
| gen. | red-eyed vireo | vireo de ojos rojos Vireo olivaceus |
| bot. | red fescue | cañuela roja Festuca rubra |
| bot. | red fescue | festuca roja Festuca rubra |
| med. | red fever | fiebre dandy (febris endemica fever) |
| med. | red fever | fiebre solar (febris endemica fever) |
| med. | red fever | fiebre roja (febris endemica fever) |
| med. | red fever | fiebre rompehuesos (febris endemica fever) |
| med. | red fever | fiebre dengue (febris endemica fever) |
| med. | red fever | dengue (febris endemica fever) |
| med. | red fever of Congo | fiebre roja de Congo |
| med. | red fever of swine | erisipeloide |
| med. | red fever of swine | enfermedad de Rosenbach |
| med. | red fever of swine | erisipela de los cerdos |
| agric. | red fir | pino oregón (Pseudotsuga douglasii, Pseudotsuga menziesii, Pseudotsuga taxifolia) |
| bot. | red fir | abeto de California Abies magnifica |
| agric. | red fire disease | enrojecimiento de las hojas de la vid (Pseudopeziza tracheiphila) |
| gen. | red-flagging system | sistema de alerta |
| med. | red flap | tiña inguinal (tinea cruris, eczema marginatum, dermatitis rimosa, tinea intertriginosa tinea trichophytina cruris) |
| med. | red flap | tricophytosis cruris (tinea cruris, eczema marginatum, dermatitis rimosa, tinea intertriginosa tinea trichophytina cruris) |
| med. | red flap | epidermophytosis cruris (tinea cruris, eczema marginatum, dermatitis rimosa, tinea intertriginosa tinea trichophytina cruris) |
| med. | red flap | eczema marginado (tinea cruris, eczema marginatum, dermatitis rimosa, tinea intertriginosa tinea trichophytina cruris) |
| med. | red flap | tiña crural (tinea cruris, eczema marginatum, dermatitis rimosa, tinea intertriginosa tinea trichophytina cruris) |
| bot. | red-flowered cotton | algodonero arborescente Gossypium arboreum (L.) |
| bot. | red-flowered cotton | árbol de algodón Gossypium arboreum (L.) |
| mamm. | red fox | zorro rojo |
| tax., energ.ind. | red fuel | gasóleo rojo |
| chem. | red 2G | azogeranina |
| chem. | red 2G | E128 |
| chem. | red 2G | CI food red 10 |
| chem. | red 2G | rojo 2g |
| med. | red-green blindness | xantocianopsia |
| med. | red-green blindness | daltonismo |
| bot. | red guava | guayabo de las Indias Psidium guajava var. pomiferum |
| bot. | red guava | guayabo cotorrero Psidium guajava var. pomiferum |
| med. | red gum | miliaria rubra |
| med. | red gum | liquen trópicus (miliaria rubra) |
| med. | red gum | estrófulo (miliaria rubra) |
| med. | red gum | miliaria (miliaria rubra) |
| chem. | red haematite | hematites roja |
| gen. | Red-Hand Commandoes | Comando de la Mano Roja |
| gen. | red-headed weaver | tejedor de cabeza roja Anaplectes rubriceps |
| chem. | red heat | temperatura del rojo |
| chem. | red heat | color rojo |
| med. | red hepatization | hepatización roja |
| tech. | red-hot | endurecido al rojo vivo |
| tech. | red-hot | calentado al rojo |
| tech. | red-hot | candente |
| tech. | red-hot | ardiente |
| med. | red hypertension | hipertensión roja |
| med. | red hypertension | hipertensión benigna |
| med. | red induration | induración negra |
| med. | red induration | induración roja |
| med. | red infarct | infarto rojo |
| tech. | red iron | ocre rojo |
| tech. | red iron | almagre |
| geol. | red iron | hematites roja |
| chem. | red iron oxide | óxido rojo de hierro |
| bot. | red juniper | enebro rojo de Virginia Juniperus virginiana |
| bot. | red juniper | cedro rojo de Virginia Juniperus virginiana |
| gen. | red jute | Corchorus olitorius |
| gen. | red jute | tossa |
| gen. | red jute | yute rojo |
| nautic. | red label | etiqueta roja (para mercancías peligrosas) |
| bot. | red laver | alga comestible Porphyra (spp.) |
| bot. | red laver | laver Porphyra (spp.) |
| tech. | red lead | plomo rojo |
| chem. | red lead | óxido salino de plomo |
| chem. | red lead | azarcón |
| chem. | red lead | Pb3O4 |
| tech. | red lead | albayalde rojo |
| gen. | red lead ore | crocoíta |
| chem. | red lead oxide | óxido de plomo rojo |
| tech. | red-lead putty | mastique de minio |
| tech. | red-lead putty | masilla de minio y albayalde con aceite de linaza cocido |
| dye. | red liquor | solución de mordiente rojo |
| soil. | red loam | tierra roja franca |
| bot. | red mahogany | caoba de la Costa de Marfil Khaya ivorensis |
| bot. | red mahogany | caoba roja africana Khaya ivorensis |
| bot. | red mangrove | manglar rojo Rhizophora mangle |
| agric. | red mangrove | mangle (Rhizophora mangle) |
| bot. | red mangrove | manglar Rhizophora mangle |
| bot. | red maple | arce rojo Acer rubrum |
| med. | red marrow | medula ósea roja (medulla ossium rubra) |
| med. | red marrow | medula roja (medulla ossium rubra) |
| gen. | Red Masai sheep | ovinos Masai |
| chem., el. | red masonry | ladrillería roja |
| agric., food.ind. | red meat | carne roja |
| chem. | red mercuric oxide | óxido mercúrico rojo |
| chem. | red mercuric oxide | óxido de mercurio rojo |
| chem. | red mercuric sulphide | sulfuro mercúrico rojo |
| med. | red mite | vendimiador (insecto; trombicula) |
| med. | red mite | chinche roja (trombicula) |
| bot. | red mombin | ciruelo de Castilla América Latina; Spondias purpurea |
| agric. | red mombin | jacote (Spondias purpurea) |
| bot. | red mombin | ciruelo agrio Spondias purpurea |
| bot. | red mombin | ciruelo amarillo Spondias purpurea |
| agric. | red mould | oidio del lúpulo (Sphaerotheca humuli) |
| bot. | red mulberry | moral rojo Morus rubra |
| bot. | red mulberry | morera roja Morus rubra |
| agric. | red mustard | mostaza negra (Brassica nigra) |
| med. | red nucleus | locus ruber (nucleus tegmenti, nucleus ruber, locus ruber) |
| med. | red nucleus | núcleo rojo (nucleus tegmenti, nucleus ruber, locus ruber) |
| agric. | red oat grass | pasto de avena roja Themeda triandra Forsk. |
| chem. | red ochre | ocre calcinado |
| agric. | red offals | despojos rojos |
| gen. | Red often symbolizes anger and guilt | El rojo, a menudo, simboliza enfado y culpa |
| gen. | Red on the traffic light means stop | El rojo del semáforo significa detenerse |
| chem. | red oxide | óxido rojo |
| chem. | red oxide of iron | óxido rojo de hierro |
| med. | red palms | sindrome de las palmas rojas |
| med. | red palms | eritema palmoplantar congenital |
| horticult. | red pepper | pimentón picante |
| bot. | red periwinkle | no-me-dejes Viola rosea |
| bot. | red periwinkle | flor de príncipe Viola rosea |
| bot. | red periwinkle | dominica Viola rosea |
| chem. | red phosphorus | fósforo rojo |
| bot. | red pine | pino rojo del Japón Pinus muricata, P. densiflora |
| bot. | red pine | pino rojo de América Pinus resinosa |
| agric. | red plum maggot | gusano de las ciruelas (Grapholitha funebrana) |
| soil. | red podzolic soil | suelo podsólico rojo |
| bot. | red poppy | amapola Papaver rhoeas |
| bot. | red poppy | adormidera silvestre Papaver rhoeas |
| agric. | red poppy | ababa (Papaver rhoeas) |
| agric. | red poppy | ababol (Papaver rhoeas) |
| med. | red poppy | flor de chivo (Papaver rhoeas L., Papaver rhoeas) |
| chem. | red precipitate | precipitado rojo |
| med. | red pulp | pulpa roja (splenic pulpa lienis pulp) |
| med. | red pulp | pulpa esplénica (splenic pulpa lienis pulp) |
| med. | red pulp cords | trabéculas del bazo (trabecula lienis) |
| med. | red pulp cords | cordones de Billroth (trabecula lienis) |
| bot. | red quebracho | quebracho santiagueño Schinopsis lorentzii |
| agric. | red quebracho | quebracho colorado (Quebrachia lorentzii, Schinopsis lorentzii) |
| bot. | red quebracho | quebracho colorado Schinopsis lorentzii |
| gen. | red raspberry | frambuesa roja |
| bot. | red raspberry bush | frambueso Rubus idaeus |
| bot. | red rose | rosa de Francia Rosa gallica |
| gen. | red rose | rosa roja |
| agric., food.ind. | red/rosé quality wine P.S.R. | vino de calidad P.D.R.tinto/rosado |
| agric. | red/rosé table wine | vino de mesa tinto/rosado |
| agric. | red sandalwood | madera de sándalo rojo |
| bot. | red sandalwood | sándalo colorado Pterocarpus santalinus |
| bot. | red sandalwood | sándalo bermejo Pterocarpus santalinus |
| bot. | red sandalwood | sándalo rojo Pterocarpus santalinus |
| agric. | red sanders wood | sándalo rojo (Pterocarpus santalinus) |
| agric. | red sanders wood | leño caliatur (Pterocarpus santalinus) |
| agric. | red santal wood | sándalo rojo (Pterocarpus santalinus) |
| bot. | red sarsaparilla | zarzaparrilla de Costa Rica Smilax officinalis |
| bot. | red sarsaparilla | zarzaparrilla de Jamaica Smilax officinalis |
| agric. | red seaweed | algas rojas |
| med. | red seed | grano rojo |
| chem. | red selenium | rojo de selenio |
| bot. | red silk-cotton tree | bómbax Bombax malabaricum |
| bot. | red sorrel | jamaica Hibiscus sabdariffa |
| bot. | red sorrel | acedera colorada Hibiscus sabdariffa |
| agric. | red sorrel | agrio de Guinea (Hibiscus sabdariffa) |
| agric. | red sorrel | jamaica (Hibiscus sabdariffa) |
| agric. | red sorrel | rosella (Hibiscus sabdariffa) |
| agric. | red sorrel | acedera colorada (Hibiscus sabdariffa) |
| bot. | red sorrel | agrio de Guinea Hibiscus sabdariffa |
| bot. | red sorrel | rosella Hibiscus sabdariffa |
| bot. | red Southern cedar | enebro criollo Juniperus lucayana |
| agric. | red spider | arañuela roja (tetranychus telarius) |
| agric. | red spider mite | arañuela roja (tetranychus telarius) |
| med. | red spidery marks | telangiectasia |
| bot. | red spruce | abeto rojo Picea rubens, Picea rubra |
| bot. | red spruce | picea roja del Canadá Picea rubens, Picea rubra |
| agric. | red steele of strawberry | podredumbre roja de la raíz de la frutilla (Phytophthora fragariae) |
| agric. | red streaked kernel | grano estriado rojo |
| agric. | red streaked kernel | grano rojo veteado |
| chem. | red sulphide | rubí de arsénico. As2S2 |
| tech. | red tape | papeleo excesivos |
| tech. | red tape | formalismos excesivos |
| fishery | red-tide outbreak | aparición de una marea roja |
| fishery | red-tide outbreak | proliferación masiva de dinoflagelados |
| tech. | red tie straps | correas o láminas rojas de enlace |
| agric. | red top | pasto quila (Agrostis alba aut.var.gigantea, Agrostis gigantea Roth) |
| bot. | red top | pastoquilla Agrostis gigantea |
| agric. | red top | agrostis blanca (Agrostis alba aut.var.gigantea, Agrostis gigantea Roth) |
| bot. | red top | agróstide blanca Agrostis gigantea |
| gen. | red triangle | triángulo rojo |
| agric. | red truffle | trufa roja (Tuber rufum) |
| bot. | red truffle | trufa roja Tuber rufum |
| tech. | red vision | eritropía |
| tech. | red vision | visión roja |
| tech. | red vision | deslumbramiento aéreo |
| tech. | red vision | deslumbramiento por hiperemia cerebral |
| med. | red vision | eritropsia |
| bot. | red water tree | eritrófleo Erythrophleum guineense |
| bot. | red water tree | elon Erythrophleum guineense |
| bot. | red withe | combreto Combretum (spp.) |
| gen. | red zone | zona peligrosa |
| gen. | ripe red tomato | tomate maduro rojo |
| chem. | Roussin's red salt | sal roja de Roussin |
| agric. | royal red shrimp | camarón rojo real (Pleoticus robustus) |
| chem. | Saturn red | rojo de saturno |
| chem. | selenium red | rojo de selenio |
| med. | sickle-shaped red corpuscle | hematíe falciforme |
| med. | sickle-shaped red corpuscle | eritrocito falciforme |
| gen. | sliced red onion | cebolla roja rebanada |
| med. | small, purplish red spot | petequia |
| gen. | small, purplish red spot | puntos rojopurpúreos |
| med. | small red kidney | riñón atrófico |
| med. | small red kidney | riñón cirrótico |
| med. | small red kidney | riñón granular |
| med. | small red kidney | cirrosis renal |
| med. | small red kidney | riñón contraído |
| med. | small red kidney | nefroescleria |
| med. | small red kidney | esclerosis renal |
| med. | small red kidney | nefroesclerosis |
| bot. | Southern red cedar | cedro de Barbada Juniperus barbadensis |
| chem. | Spanish red | rojo de España |
| chem. | Spanish red oxide | óxido rojo español |
| med. | Stilling's red nucleus | núcleo rojo (nucleus ruber) |
| med. | stroma of the red blood corpuscles | estroma de Rollet |
| gen. | The child's cheeks are red | Las mejillas del niño están rojas |
| gen. | The hair on her head is red | El pelo en su cabeza es rojo |
| med. | The League of Red Cross Societies | Liga de Sociedades de la Cruz Roja |
| gen. | The light is red | La luz es roja |
| gen. | The man is facing the red wall | El hombre está mirando la pared roja |
| gen. | The sneakers are red, white, and gray with white laces and black soles | Las zapatillas son de color rojo, blanco y gris, con cordones blancos y las suelas negras |
| gen. | The striped cat is playing with red yarn | El gato a rayas está jugando con un hilo rojo |
| gen. | The woman has long, red hair | La mujer tiene el pelo rojo largo |
| gen. | There are four basic types of onions: yellow and brown, white, red, and sweet | Hay cuatro tipos básicos de cebolla: amarilla y marrón, blanca, roja y dulce |
| chem. | toluidine red | rojo de toluidina |
| chem. | toluylene red | rojo de toluileno |
| chem. | toluylene red | rojo neutro |
| gen. | transportable, infra-red, wireless simultaneous translation system | instalación de traducción simultánea transportable, por infrarrojos y sin hilos |
| chem. | Turkey red | rojo de Turquía |
| chem. | Turkey red oil | aceite rojo de Turquía |
| chem. | turkey red oil | aceite de ricino sulfonado |
| agric. | typical red fescue | festuca roja rastrera (Festuca rubra var. genuina) |
| chem. | van Dyck red | rojo Van Dijk |
| chem. | Venetian red | rojo veneciano |
| gen. | We have to repaint the red wall | Tenemos que repintar la pared de color rojo |
| bot. | Western red cedar | tuya roja Thuja plicata |
| agric. | wheat red dog | harinillas de trigo |
| agric. | wild red rice | arroz rojo (Oryza rufipogon Griff.) |
| agric. | wild red rice | arroz colorado (Oryza rufipogon Griff.) |
| gen. | wireless infra-red interpreting system | sistema de interpretación por infrarrojos |
