| Subject | English | Spanish |
| chem. | content meter by ultra-violet fluorescence | uraniómetro por fluorescencia |
| chem. | content meter by ultra-violet fluorescence | fluorímetro por excitación ultravioleta |
| med. | deproteinization of the biological samples by ultra-filtration | desproteinización de las muestras biológicas por ultrafiltración |
| meteorol. | EXtreme ultra-violet and X–ray Irradiance Sensors | sensores de irradiancia en el ultravioleta extremo y rayos X |
| IT | extreme-ultra-violet lithography | litografía EUV |
| immigr., tech. | fibre which show up under ultra-violet light | fibrilla visible al ultravioleta |
| immigr., tech. | fibre which show up under ultra-violet light | fibrilla visible al UV |
| immigr., tech. | fibre which show up under ultra-violet light | fibrilla visible a la luz ultravioleta |
| gen. | filters for ultra-violet rays, for medical purposes | filtros para rayos ultravioletas para uso médico |
| gen. | filters for ultra-violet rays for medical purposes | filtros para rayos ultravioletas para uso médico |
| gen. | filters for ultra-violet rays, for photography | filtros para rayos ultravioletas para la fotografía |
| gen. | filters for ultra-violet rays, for photography | filtros para rayos ultravioletas para fotografía |
| gen. | filters for ultra-violet rays, for photography | filtros para rayos ultravioleta para la fotografía |
| nat.sc. | fixed ultra-violet lamp | foco de mesa de rayos ultravioleta |
| el. | light with a high ultra-violet content | luz rica en ultravioletas |
| el. | monitor of ultra-violet solar energy | detector de energía solar en ultravioleta |
| environ., chem. | non-dispersive ultra-violet resonance absorption analyzer | analizador no dispersivo por absorción en los ultravioletas |
| nat.sc. | portable ultra-violet lamp | lámpara portátil de rayos ultravioleta |
| resin. | semi-ultra accelerator | semi-ultraacelerante |
| med. | skin carcinoma caused by ultra-violet radiation | carcinoma cutáneo por rayos UVA |
| textile | superior o. ultra cleaner | limpiador o lavador a niveles |
| life.sc., environ. | ultra-abyssal | hadal |
| life.sc., environ. | ultra-abyssal depth | profundidad hadal |
| resin. | ultra-accelerator | ultraacelerador |
| industr., construct., chem. | ultra accelerator | ultraacelerante |
| chem. | ultra-accelerator | ultracelerador |
| social.sc. | ultra-activity | ultraactividad |
| soil. | ultra basic rock | roca ultrabásica |
| comp., MS | ultra-bold | ultranegrita (Having a font weight that corresponds to a weight class value of 800 according to the OpenType specification) |
| chem. | ultra clean chemical laboratory | laboratorio químico ultralimpio |
| tech. | ultra clean laboratory | laboratorio ultralimpio |
| mater.sc. | ultra-clean technology | tecnología de lo ultralimpio |
| chem. | ultra-cryomat | ultra-criostato |
| el. | ultra-fast gated receiver | receptor activado mediante puerta ultrarrápida |
| gen. | ultra-filtration | ultrafiltración |
| gen. | ultra filtration | ultrafiltración |
| met. | ultra-fine grain steel | acero de grano ultrafino |
| econ. | ultra-fine particle | partícula ultrafina |
| commun. | ultra-high definition video | vídeo de muy alta definición |
| UN, tech. | ultra high frequency | frecuencia ultraalta |
| commun. | ultra-high frequency | frecuencia ultra alta |
| commun., nat.sc. | ultra-high frequency | ultra alta frecuencia |
| tech. | ultra high frequency | frecuencia ultra alta |
| rem.sens. | ultra-high frequency | frecuencia ultra-alta |
| tech. | ultra high frequency | frecuencia ultraalta (banda de frecuencia de corto alcance que usan los aviones tácticos principalmente) |
| commun. | ultra high frequency band | banda de ondas decimétricas |
| agric., mech.eng. | ultra high frequency thawing | descongelación por hiperfrecuencias |
| agric., mech.eng. | ultra high frequency thawing | descongelación por ultrafrecuencias |
| commun. | ultra high frequency unit | puesto UHF |
| commun. | ultra high frequency unit | puesto VHF |
| auto. | ultra-high strength steel | acero de alta resistencia (UHSS) |
| met. | ultra high strength steel | acero de muy alta resistencia |
| auto. | ultra-high strength steel | acero de alta fuerza (UHSS) |
| health., nat.sc., food.ind. | ultra high temperature | temperatura ultra-alta |
| agric., food.ind. | ultra-high temperature | temperatura ultra alta |
| agric., food.ind. | ultra high temperature treated milk | leche ultrapasteurizada |
| agric., food.ind. | ultra high temperature treated milk | leche de tipo UHT |
| agric., food.ind. | ultra high temperature treated milk | leche uperizada |
| agric. | ultra high temperature treated milk | leche tipo U.H.T. |
| food.ind., can. | ultra-high temperature treatment | esterilización UHT |
| food.ind., can. | ultra-high temperature treatment | tratamiento UHT |
| food.ind., can. | ultra-high temperature treatment | esterilización a temperatura muy elevada |
| phys.sc., mech.eng. | ultra-high vacuum | ultravacío |
| phys.sc., mech.eng. | ultra-high vacuum | ultra alto vacío |
| el. | ultra-high vacuum system | sistema de ultravacío |
| IT | ultra-high vacuum transfer between modules | trasvase ultravacío entre módulos |
| dril. | ultra-high viscosity | viscosidad ultra-alta |
| IT, el. | ultra-high-density microelectronics for information storage | microelectrónica de elevadísima densidad para almacenamiento de información |
| transp. | ultra-high-density seating | configuración máxima de asientos |
| IT | ultra-high-level language | lenguaje superevolucionado |
| food.ind. | ultra-high-temperature milk | leche UHT |
| food.ind. | ultra-high-temperature milk | leche uperizada |
| food.ind. | ultra-high-temperature milk | leche tratada a temperatura ultraelevada |
| food.ind. | ultra-high-temperature milk | leche ultrapasteurizada |
| food.ind. | ultra-high-temperature milk | leche de larga conservación |
| food.ind., can. | ultra-high-temperature sterilization | tratamiento UHT |
| food.ind., can. | ultra-high-temperature sterilization | esterilización UHT |
| food.ind., can. | ultra-high-temperature sterilization | esterilización a temperatura muy elevada |
| IT | ultra large scale integration | integración a muy grande escala |
| el. | ultra large-scale integration | integración a escala supergrande |
| el. | ultra large-scale integration | integración ULSI |
| el. | ultra large-scale integration | integración SLSI |
| IT | ultra large-scale integration | integración a escala ultra grande |
| el. | ultra large-scale integration | integración a ultra gran escala |
| comp., MS | ultra-light | ultradelgado (Having a font weight that corresponds to a weight class value of 200 according to the OpenType specification) |
| transp., avia. | ultra-light aircraft | aeronave ultraligera |
| transp., avia. | ultra-light aircraft | aeronave de estructura ultraligera |
| transp., avia. | ultra-light aircraft | ultraligero |
| transp., avia. | ultra-light aircraft | ultraligero motorizado |
| transp. | ultra-light aircraft | avión ultraligero motorizado |
| el. | ultra-light blade | pala ultraligera |
| nat.sc. | Ultra-Long Duration Balloon | Globo de Duración Ultralarga |
| tech. | ultra-low temperature freezer | ultracongelador |
| dril. | ultra-low viscosity | viscosidad ultra-baja |
| acoust. | ultra low volume | volumen ultrabajo |
| acoust. | ultra low volume | ULV |
| acoust. | ultra low volume | VUB |
| acoust. | ultra low volume | ultrabajo volumen |
| pest.contr. | ultra-low volume liquid | producto para aplicación a UBV |
| pest.contr. | ultra-low volume liquid | producto para aplicación a ultra-bajo-volumen |
| nat.sc., agric. | ultra low volume sprayer | atomizador de atomización fina |
| pest.contr. | ultra-low volume suspension | suspensión para aplicación a UBV |
| pest.contr. | ultra-low volume suspension | suspensión para aplicación a ultra-bajo-volumen |
| dril. | ultra-low-tar mineral oil | aceite mineral con contenido ultra-bajo de brea |
| nat.sc., agric. | ultra low-volume sprayer | atomizador V.U.B. |
| nat.sc., agric. | ultra low-volume sprayer | atomizador a volumen ultra bajo |
| pest.contr. | ultra-low-volume spraying | nebulización de ultra bajo volumen |
| pest.contr. | ultra-low-volume spraying | pulverización a muy bajo volumen |
| comp., MS | ultra-mobile PC | PC ultra móvil (A class of mobile PCs that has a touch screen no larger than 7 inches and a tablet pen) |
| gen. | ultra poverty | pobreza extrema |
| earth.sc. | ultra pure material with low optical loss | material ultrapuro de escasa pérdida óptica |
| nat.sc., chem. | ultra pure water | agua ultrapura |
| met. | ultra rapid heat treatment | tratamiento térmico ultrarrápido |
| genet. | ultra-rapid metabolisers | metabolizadores ultrarrápidos |
| med. | ultra shortwave diathermy apparatus | aparato de diatermia de ondas muy cortas |
| med. | ultra-soft rays | rayos ultrablandos |
| med. | ultra-sonic diathermy apparatus | aparato de diatermia de ultrasonidos |
| chem. | ultra-sonification bath | baño ultrasónico |
| med. | ultra-structural abnormality | anomalía ultraestructural |
| el. | ultra-thin carbon film | película ultrafina de carbono |
| mun.plan. | ultra-thin towel | compresa extra-plana |
| mun.plan. | ultra-thin, winged towel | compresa extraplana con alas |
| environ. | ultra-trace | ultratraza |
| el. | ultra-violet | lámpara de rayos ultravioletas |
| chem. | ultra-violet | ultravioleta |
| agric. | ultra-violet damage | daño causado por rayos ultravioletas |
| chem. | ultra-violet excitation | fluorímetro por excitación ultravioleta |
| chem. | ultra-violet excitation | uraniómetro por fluorescencia |
| commun. | ultra-violet exposer | fotoexpositor ultravioleta |
| environ., chem. | ultra violet fluorescence sulfur dioxide analysis | detección del SO2 por fluorescencia UV |
| environ., chem. | ultra violet fluorescence sulfur dioxide analysis | medición del SO2 por fluorescencia UV |
| environ., chem. | ultra violet fluorescence sulphur dioxide analysis | detección del SO2 por fluorescencia UV |
| environ., chem. | ultra violet fluorescence sulphur dioxide analysis | medición del SO2 por fluorescencia UV |
| stat., el. | ultra-violet lamp | lámpara emisor de ultravioleta |
| med. | ultra-violet lamp | sol artificial |
| gen. | ultra-violet lamp | lámpara ultravioleta |
| nat.sc. | ultra-violet light source | foco de rayos ultravioleta |
| earth.sc., el. | ultra violet lighting | alumbrado UV |
| earth.sc., el. | ultra violet lighting | alumbrado ultravioleta |
| earth.sc. | ultra-violet radiation | radiación ultravioleta |
| immigr., environ., tech. | ultra-violet radiation | luz ultravioleta |
| agric. | ultra-violet radiation | rayos ultravioleta |
| chem., el. | ultra-violet radiation type safety device | detector de llama por radiación ultravioleta |
| gen. | ultra-violet ray lamps not for medical purposes | lámparas de rayos ultravioletas que no sean para uso médico |
| gen. | ultra-violet ray lamps for medical purposes | lámparas de rayos ultravioletas para uso médico |
| earth.sc. | ultra violet ray range | dominio del ultravioleta |
| cultur. | ultra-violet rays | rayos ultravioleta |
| chem. | ultra-violet rays | rayos ultravioletas |
| earth.sc., mater.sc. | ultra-violet sensitive coding | codificación de rayos ultravioletas |
| chem. | ultra-violet spectrum | espectro ultravioleta |
| gen. | ultra violet stabilizer | estabilizador U-V |
| gen. | ultra violet stabilizer | estabilizador ultravioleta |
| agric., chem. | ultra-violet sterilisation | esterilización por rayos ultravioleta |
| law | ultra vires | extralimitación en el ejercicio de facultades |
| commun., tech. | ultra-wide band | banda ultraancha |
| commun. | ultra-wide-band | banda muy amplia |
| comp., MS | ultra wide-band | banda ultraancha (A wireless technology similar to radar that is centered on the 200MZ to 4GHz band) |
| med. | ultra X-rays | rayos de Millikan |
| med. | ultra X-rays | rayos cósmicos |
| earth.sc. | vacuum ultra violet | UV del vacío |
| earth.sc. | vacuum ultra violet | ultravioleta del vacío |
