| Subject | English | Spanish |
| gen. | African giant rat | rata gigante gambiense Cricetomys gambianus |
| bot. | asafetida giant fennel | asafétida Ferula assafoetida |
| bot. | asafetida giant fennel | asa fétida Ferula assafoetida |
| nat.sc. | Asymptotic Giant Branch | Rama Asintótica de Gigantes |
| med. | Bannister's disease giant urticaria | edema agudo circunscrito |
| med. | Bannister's disease giant urticaria | edema de Milton |
| med. | Bannister's disease giant urticaria | angioneurosis mucosa |
| med. | Bannister's disease giant urticaria | angioneurosis cutánea |
| med. | Bannister's disease giant urticaria | edema de Quincke |
| life.sc. | characterisation of the turbulent "giant filament" | caracterización del "filamento gigante" turbulento |
| life.sc., environ. | Galapagos giant tortoise | tortuga de las Galápagos (Chelonoidis nigra, Geochelone nigra) |
| environ., nat.res. | Galápagos giant tortoise | tortuga de las Galápagos (Geochelone nigra) |
| nat.res. | giant abalone | oreja de mar gigante (Haliotis gigantea) |
| entomol. | giant African cockroach | cucaracha gigante africana Leucophaea gigantea |
| nat.res. | giant african snail | babosa gigante africana (Achatina fulica) |
| nat.res. | giant african snail | acatina africana (Achatina fulica) |
| nat.res. | giant african snail | gran caracol africano (Achatina fulica) |
| nat.res., fish.farm. | giant African threadfin | barbudo gigante africano (Polydactilus quadrifilis) |
| nat.sc., agric. | giant African threadfin | barbudo rayado (Polynemus quadrifilis) |
| nat.res. | giant ant-eater | oso hormiguero (Myrmecophaga tridactyla) |
| life.sc., environ., fish.farm. | giant arapaima | arapaima (Arapaima gigas) |
| forestr. | giant arborvitae | árbol de la vida gigante (Thuja gigantea, Thuja plicata) |
| forestr. | giant arborvitae | tuya gigante (Thuja gigantea, Thuja plicata) |
| environ., nat.res. | giant armadillo | tatú gigante (Priodontes maximus) |
| nat.sc., agric. | giant barnacle | balano gigante (Megabalanus psittacus) |
| pack. | giant jumbo board | cartón ondulado de grandes acanaladuras |
| nat.sc., agric. | giant brown seaweeds | laminariaceas (Laminariaceae) |
| nat.sc., agric. | giant brown seaweeds | laminarias (Laminariaceae) |
| nat.sc., agric. | giant brown seaweeds | algas macroscopicas (Laminariaceae) |
| industr., construct. | giant cabuya | pita floja |
| industr., construct. | giant cabuya | cabuya gigante |
| bot. | giant cabuya | pitera Furcraea gigantea, Agave foetida |
| environ., nat.res., fish.farm. | giant catfish | siluro gigante (Pangasianodon gigas) |
| biotechn. | giant cell | célula gigante |
| med. | giant-cell arteritis | mesarteritis gigantocelular (arteritis cranialis, arteritis senilis acuta) |
| med. | giant-cell arteritis | arteritis temporal (arteritis cranialis, arteritis senilis acuta) |
| med. | giant cell carcinoma | cáncer de células gigantes |
| med. | giant-cell carcinoma | carcinoma gigantocelular (carcinoma gigantocellulare) |
| med. | giant cell myeloma | mieloma gigantocelular |
| med. | giant cell sarcoma | sarcoma gigantocelular |
| med. | giant cell tumor | tumor de células gigantes |
| med. | giant-cell tumor | tumor de células gigantes |
| med. | giant cells | células gigantes |
| health., nat.sc. | giant chromosome | politénico |
| health., nat.sc. | giant chromosome | cromosoma politénico |
| health., nat.sc. | giant chromosome | cromosoma gigante |
| med. | giant colon | enfermedad de Hirschsprung |
| med. | giant colon | megacolon congénito |
| agric. | giant colonies | colonia gigante |
| med. | giant condyloma acuminata | condiloma acuminado gigante (condyloma acuminatum giganteum, condylomata accuminata) |
| ichtyol. | giant crunch squid | cranquiluria antártica Mesonychoteuthis hamitoni |
| entomol. | giant Cuban cockroach | cucaracha gigante cubana Blaberus craniifer |
| life.sc., fish.farm. | giant cupped oyster | ostra japonesa (Crassostrea gigas) |
| life.sc., fish.farm. | giant cupped oyster | gigas (Crassostrea gigas) |
| life.sc., fish.farm. | giant cupped oyster | ostión del Pacífico (Crassostrea gigas) |
| life.sc., fish.farm. | giant cupped oyster | ostión (Crassostrea gigas) |
| life.sc., fish.farm. | giant cupped oyster | ostra de pobre (Crassostrea gigas) |
| life.sc., fish.farm. | giant cupped oyster | ostión japonés (Crassostrea gigas) |
| life.sc., fish.farm. | giant cupped oyster | ostra portuguesa (Crassostrea gigas) |
| nat.res. | giant duckweed | espirodela (Spirodela polyrhiza Schleid.) |
| ichtyol. | giant false donax | coquina gigante Iphigenia brasiliana |
| bot. | giant fennel | cañaheja Ferula communis |
| bot. | giant fennel | caña de hierro Ferula communis |
| bot. | giant fennel | férula Ferula communis |
| bot. | giant fennel | dorema Dorema ammoniacum |
| nat.sc., agric. | giant fescue | festuca gigantea (Festuca gigantea Vill.) |
| agric. | giant fescue | festuca gigante (Festuca gigantea) |
| nat.sc., agric. | giant filbert | avellano de Lambert (Corylus maxima, Corylus tubulosa) |
| bot. | giant filbert | avellano de Lambert Corylus maxima, tubulosa |
| forestr. | giant fir | abeto gigante (Abies grandis) |
| forestr. | giant fir | abeto de Vancouver (Abies grandis) |
| med. | giant follicular lymphadenopathy | linfoadenopatía folicular gigante |
| med. | giant follicular lymphadenopathy | enfermedad de Brill-Baehr-Rosenthal |
| med. | giant follicular lymphoma | linfoadenopatía folicular gigante |
| med. | giant follicular lymphoma | enfermedad de Brill-Baehr-Rosenthal |
| nat.res. | giant forest hog | gran cerdo de bosque (Hylochoerus meinertzhagen) |
| nat.res. | giant forest hog | cerdo gigante de Kenia (Hylochoerus meinertzhagen) |
| gen. | giant forest hog | hilóquero |
| ichtyol. | giant freshwater prawn | langostino gigante de agua dulce |
| med. | giant fìnger | macrodactilia |
| ichtyol. | giant gamba prawn | langostino moruno Aristaemorpha foliacea |
| agric. | giant garlic | ajo de Egipto (Allium scorodoprasum) |
| bot. | giant garlic | ajo pardo Allium scorodoprasum |
| bot. | giant garlic | ajo porruno Allium scorodoprasum |
| bot. | giant garlic | ajo de España Allium scorodoprasum |
| agric. | giant garlic | ajo pardo (Allium scorodoprasum) |
| agric. | giant garlic | rocambole (Allium scorodoprasum) |
| agric. | giant garlic | rocambola (Allium scorodoprasum) |
| bot. | giant garlic | racambola Allium scorodoprasum |
| med. | giant gastric rugae | pliegues gigantes del estómago |
| fish.farm. | giant goby | gobio gigante (Gobius capito, Gobius cobitis) |
| ichtyol. | giant gourami | gurami Osphyronemus gourami |
| nat.res. | giant gourami | gurami gigante (Osphronemus goramy) |
| nat.sc., agric. | "Giant Governor" banana | "Grande naine" |
| nat.sc., agric. | "Giant Governor" banana | banano gigante "Giant Governor" |
| agric. | Giant Governor banana | banano gigante Giant Governor |
| nat.res., agric. | giant granadilla | granadilla gigante (Passiflora quadrangularis) |
| agric. | giant granadilla | granadilla real (Passiflora quadrangularis) |
| bot. | giant granadilla | granadilla real Passiflora quadrangularis |
| ichtyol. | giant grouper | mero guasa Epinephelus itajara, Promicrops itajara |
| nat.sc., agric. | giant grouper | mero lanceolado (Epinephelus lanceolatus) |
| ichtyol. | giant guitarfish | pez cuna manchado Rhynchobatus djiddensis |
| ichtyol. | giant hairy melongena | melongena negra Pugilina morio |
| ichtyol. | giant hairy triton | tritón gigante peludo Cymatium parthenopeum |
| avia., med. | giant hand illusion | ilusión de la mano gigante |
| nat.res. | giant hornet | avispón (Vespa crabro, Vespa crabro germana) |
| entomol. | giant hornet | avispón Vespa crabo (L.) |
| entomol. | giant horntail | sírice gigante de la madera Sirex gigas, Urocerus gigas |
| nat.sc., agric. | giant horntail | sirice gigante (Sirex gigas, Urocerus gigas, Urocerus gigas flavicornis, Xanthosirex gigas) |
| nat.res. | giant horsetail | equiseto maximo (Equisetum maximum Lam., Equisetum telmateja Ehrh.) |
| nat.res. | giant hummingbird | colibrì gigante (Patagona gigas, Patagonia gigas) |
| med. | giant hypertrophic gastritis | gastritis hipertrófica gigante |
| nat.sc., agric. | giant kelp | gran kelp (Macrocystis pyrifera) |
| nat.sc., agric. | giant kelp | macrocistos (Macrocystis pyrifera) |
| nat.sc., agric. | giant kelp | macrocistis (Macrocystis pyrifera) |
| nat.sc., agric. | giant kelp | macrocystis (Macrocystis pyrifera) |
| bot. | giant kelp | cachiyuyo Macrocystis pyrifera |
| bot. | giant kelp | gran kelp Macrocystis pyrifera |
| vet.med. | giant kidney worm | acantocéfalo renal Dioctophyma renale |
| vet.med. | giant kidney worm infestation | verminosis renal Dioctophyma renale |
| vet.med. | giant kidney worm infestation | dioctofimosis renal Dioctophyma renale |
| industr., construct. | giant lily | cabuya gigante |
| industr., construct. | giant lily | pita floja |
| bot. | giant lily | pitera Furcraea gigantea, Agave foetida |
| vet.med. | giant liver fluke | distoma hepático Fasciola gigantica |
| life.sc., environ., fish.farm. | giant manta | manta gigante (Manta birostris, Manta hamiltoni) |
| fish.farm. | giant manta | manta (Manta birostris, Manta hamiltoni) |
| ichtyol. | giant manta | manta gigante Manta birostris |
| fish.farm. | giant manta | manta del Pacífico (Manta birostris, Manta hamiltoni) |
| life.sc., environ., fish.farm. | giant manta | manta atlántica gigante (Manta birostris, Manta hamiltoni) |
| entomol. | giant mealybug | piojo harinoso Drosicha stebbingii |
| entomol. | giant mealybug | chinche harinosa Drosicha stebbingii |
| chem. | giant molecule | macromolécula |
| chem. | giant molecule | molécula gigante |
| nat.sc., agric. | giant moth-borer | taladrador gigantesco (Castnia licas, Castnia licoides, Castnia licus) |
| med. | giant osteoid osteoma | osteoblastoma benigno |
| med. | giant osteoid osteoma | tumor de células gigantes |
| environ., nat.res. | giant otter | nutria gigante (Pteronura brasiliensis) |
| environ., nat.res. | giant otter | nutria brasileña (Pteronura brasiliensis) |
| life.sc., environ. | giant otter | nutria gigante o brasileña (Pteronura brasiliensis) |
| nat.res. | giant panda | panda gigante (Ailuropoda melanoleuca) |
| life.sc., environ. | giant pangolin | pangolín gigante (Manis gigantea) |
| nat.sc., agric. | giant pearlwinkle | peonza sudafricana (Turbo sarmaticus) |
| med. | giant pelvis | pelvis justo major (pelvis aequabiliter justo major, pelvis justo major) |
| med. | giant pelvis | pelvis gigante (pelvis aequabiliter justo major, pelvis justo major) |
| med. | giant pelvis | pelvis justo-major |
| nat.res. | giant periwinkle | peonza sudafricana (Turbo sarmaticus) |
| nat.res. | giant periwinkle | bígaro sudafricano (Turbo sarmaticus) |
| nat.sc. | giant petrel | petrel gigante (Macronectes giganteus) |
| environ., nat.res. | giant pied-billed grebe | somormujo de Atitán (Podilymbus gigas) |
| therm.energ. | giant pulse | pulso gigante |
| agric. | giant pumpkin | calabaza de cidra (Cucurbita maxima) |
| agric. | giant pumpkin | calabaza redonda (Cucurbita maxima) |
| agric. | giant pumpkin | calabaza confitera (Cucurbita maxima) |
| agric. | giant pumpkin | amarilla (Cucurbita maxima) |
| agric. | giant pumpkin | calabaza (Cucurbita maxima) |
| agric. | giant pumpkin | quinoa (Cucurbita maxima) |
| agric. | giant pumpkin | zapallo (Cucurbita maxima) |
| agric. | giant pumpkin | quinua (Cucurbita maxima) |
| agric. | giant pumpkin | calabaza amarilla (Cucurbita maxima) |
| med. | giant pyramidal cells | células de Betz |
| med. | giant pyramidal cells | células gigantes piramidales |
| med. | giant pyramidal cells | células piramidales gigantes |
| med. | giant pyramids | células de Betz |
| med. | giant pyramids | células gigantes piramidales |
| med. | giant pyramids | células piramidales gigantes |
| nat.sc., agric. | giant ragweed US | artemisa grande (Ambrosia trifida L.) |
| life.sc., fish.farm. | giant red shrimp | langostino moruno (Aristaeomorpha foliacea) |
| ichtyol. | giant red shrimp | langostino moruno Aristaemorpha foliacea |
| life.sc., fish.farm. | giant red shrimp | gamba española (Aristaeomorpha foliacea) |
| bot. | giant redwood | sequoía gigante Sequoia gigantea |
| bot. | giant redwood | pino gigante de California Sequoia gigantea |
| nat.res. | giant reed | caña común (arundo donax) |
| bot. | giant reed | caña común Arundo donax |
| fish.farm. | giant river prawn | langostino de río (Macrobrachium rosenbergii) |
| environ., nat.res. | giant sable antelope | antilope negro gigante (Hippotragus niger variani) |
| life.sc., environ. | giant sable antelope | antílope negro gigante (Hippotragus niger variani) |
| textile | giant saddle stitch | punto gigante de guarnicionero |
| nat.sc., agric. | giant salamander | salamandra gigante (Andrias, Megalobatrachus) |
| environ., nat.res. | giant salamanders | salamandra gigante (Andrias spp.) |
| environ., nat.res. | giant salamanders | salamandras gigantes (Cryptobranchidae) |
| environ., nat.res. | giant scops owl | autillo de Guerney (Mimizuku gurneyi) |
| fish.farm. | giant sea bass | mero gigante del Pacífico (Stereolepis gigas) |
| nat.res. | giant sea perch | perca gigante (Lates calcarifer (Bloch)) |
| nat.res. | giant seaperch | perca gigante (Lates calcarifer) |
| agric. | giant sequoia | sequoia gigante (Sequoia gigantea, Sequoiadendron giganteum, Wellingtonia gigantea) |
| agric. | giant sequoia | árbol del mammut (Sequoia gigantea, Sequoiadendron giganteum, Wellingtonia gigantea) |
| entomol. | giant silkworm moth | gran pavón de noche Saturnia pyri |
| nat.res. | giant silkworm moth | gran pavón de noche (Saturnia pyri) |
| nat.res. | giant silkworm moth | pequeño pavón de noche (Eudia pavonia, Saturnia pavonia) |
| agric., construct. | giant sprinkler | regador gigante |
| nat.res. | giant squid | calamar gigante (Architeuthis dux) |
| hobby | giant stride | paso de gigante |
| nat.sc., agric. | giant stropharia | strofaria gigante (Stropharia rugoso annulata) |
| nat.sc., agric. | giant sugarcane borer | taladrador gigantesco (Castnia licas, Castnia licoides, Castnia licus) |
| med. | giant swelling | edema agudo circunscrito |
| med. | giant swelling | angioneurosis cutánea |
| med. | giant swelling | angioneurosis mucosa |
| med. | giant swelling | edema de Milton |
| med. | giant swelling | edema de Quincke |
| agric., mech.eng. | giant tank | depósito gigante |
| nat.res., fish.farm. | giant tiger prawn | langostino tigre gigante (Penaeus monodon) |
| nat.sc., agric. | giant tiger prawn | langostino yumbo (Penaeus monodon) |
| life.sc., fish.farm. | giant tiger prawn | langostino monodon (Penaeus monodon) |
| nat.sc., agric. | giant tiger prawn | langostino jumbo (Penaeus monodon) |
| life.sc., environ. | giant tropical pitcher | cántaro tropical gigante (Nepenthes rajah) |
| med. | giant tumour cell | célula gigante tumoral |
| nat.sc., agric. | giant turkey | pavo gigante |
| cultur. | giant video-wall | pantalla de vídeo gigante |
| entomol. | giant water bug | picador de los dedos de los piés Lethocerus americanus |
| entomol. | giant water bug | picapiés Lethocerus americanus |
| nat.sc., agric. | giant willow aphid | pulgón grande del sauce (Lachnus salignus, Pterochlorus salignus, Tuberolachnus fuliginosus, Tuberolachnus punctatus, Tuberolachnus ribarius, Tuberolachnus salicina, Tuberolachnus salicis, Tuberolachnus salignus) |
| nat.res. | giant wood spider | araña gigante (Nephila maculata) |
| entomol. | giant wood wasp | sírice gigante de la madera Sirex gigas, Urocerus gigas |
| nat.sc., agric. | giant wood wasp | sirice gigante (Sirex gigas, Urocerus gigas, Urocerus gigas flavicornis, Xanthosirex gigas) |
| nat.res. | Hierro giant lizard | lagarto gigante de Hierro (Gallotia simonyi) |
| med. | Langhans' giant cells | células gigantes del tubérculo |
| med. | Langhans' giant cells | células de Langhans |
| med. | multinucleated giant cell | celula giante plurinucleada |
| ichtyol. | smooth giant clam | almeja gigante Tridacna derasa |
| nat.res. | southern giant petrel | petrel gigante (Macronectes giganteus) |
| med. | Sternberg's giant cells | células de Hodgkin |
| med. | Sternberg's giant cells | células de Sternberg-Reed |
| med. | Sternberg's giant cells | células de Sternberg |
| gen. | We are moving forward with giant steps | Estamos avanzando con pasos de gigante |
