| Subject | English | Spanish |
| ed. | academic major | especialización académica |
| med. | apparatus major | aparato major |
| med. | apparatus major | litotomía mediana |
| el. | assembly major item | ítem mayor de montaje |
| el. | assy major item | ítem mayor de montaje |
| gen. | basic major truncation | truncado de la cresta |
| med. | bursa of psoas major tendon | bolsa serosa iliopectínea |
| med. | bursa of teres major muscle | bolsa del músculo redondo mayor |
| med. | canna major | canilla (tibia) |
| med. | canna major | tibia |
| health., nat.sc. | Class II Major Histocompatibility Complex glycoprotein | glicoproteína de clase II del complejo principal de histocompatibilidad |
| med. | clavicular part of pectoralis major muscle | parte clavicular del pectoral mayor (pars clavicularis musculi pectoralis majoris) |
| gen. | Committee for implementation of the directive on the control of major-accident hazards involving dangerous substances | Comité de aplicación de la directiva relativa al control de los riesgos inherentes a los accidentes graves en los que intervengan sustancias peligrosas |
| industr. | Committee for the Adaptation to Technical Progress of the Directives on Major Accident Hazards of Certain Industrial Activities | Comité de adaptación al progreso técnico - riesgos de accidentes graves en determinadas actividades industriales |
| gen. | Committee of Competent Authorities on Major Accident Hazards | Comité de autoridades competentes para riesgos de accidentes graves |
| gen. | company sergeant major | Brigada |
| med. | condition of major epilepsy | estatus de gran mal (status epilepticus) |
| UN, account. | construction, alteration, improvement and major maintenance | construcción, reformas, mejoras y trabajos importantes de conservación |
| law, industr. | Control of Industrial Major Accident Hazards Regulations | Normativa para el control del peligro de accidentes industriales graves |
| social.sc., UN | Convention concerning the Prevention of Major Industrial Accidents | Convenio sobre la prevención de accidentes industriales mayores |
| org.name. | Coordination and Cooperation Organization for the Control of Major Endemic Diseases | Organización de Coordinación y Cooperación para la Lucha contra las Principales Endemias |
| org.name. | Coordination and Cooperation Organization for the Control of Major Endemic Diseases | OCCGE |
| med. | cornu major | asta mayor del hioides |
| insur. | cover against major risks | cobertura de riesgos grandes |
| environ. | critical pathways for the transfer of radionuclides present a major radiation hazard | las vías críticas de transferencia representan un riesgo mayor de irradiación |
| gen. | debate on topical and urgent subjects of major importance | debate sobre problemas de actualidad,urgencia y especial importancia |
| ed. | double-major | doble titulación |
| ed. | double-major | cursar estudios de doble titulación |
| mil. | drum major | tambor mayor |
| med. | epilepsia major | gran mal (epilepsia gravior) |
| med. | epilepsia major | epilepsia gravior |
| gen. | EUR-OPA Major Hazards Agreement | Acuerdo del Consejo de Europa para Riesgos Mayores EUR-OPA |
| environ. | EUR-OPA Major Hazards Agreement | Acuerdo Parcial Abierto en materia de Prevención, de Protección y de Organización de los Socorros contra los Riesgos Naturales y Tecnológicos Mayores |
| gen. | EUR-OPA Major Hazards Agreement | Acuerdo EUR-OPA |
| stat., fish.farm. | FAO major fishing area | zona FAO |
| med. | forceps major | forceps posterior |
| med. | forceps major | forceps mayor |
| el. | forward major axis of the aerial | eje principal delantero de una antena |
| el. | forward major axis of the antenna | eje principal delantero de una antena |
| med. | fossa scarpae major Scarpa's triangle | triángulo de Scarpa (trigonum femorale) |
| med. | fossa scarpae major Scarpa's triangle | triángulo inguinal (trigonum femorale) |
| med. | fossa scarpae major Scarpa's triangle | trígono inguinal (trigonum femorale) |
| med. | fossa scarpae major Scarpa's triangle | fosa de Scarpa (trigonum femorale) |
| med. | fossa supraclavicularis major | fosa supraclavicular mayor (trigonum omoclaviculare) |
| med. | globus major | globus major |
| med. | globus major | globo mayor (caput epididymidis) |
| med. | globus major | cabeza del epididimo (caput epididymidis) |
| med. | globus major | cabeza del epidídimo |
| insur. | granting of major benefits in kind | formulario E114 |
| insur. | granting of major benefits in kind | concesión de prestaciones en especie de gran importancia |
| law, hobby | Handbook for police and security authorities concerning cooperation at major events with an international dimension | Manual para las autoridades de policía y seguridad relativo a la cooperación en grandes acontecimientos de dimensión internacional |
| chem. | hexabromocyclododecane and all major diastereoisomers identified | hexabromociclododecano y todos los principales diastereoisómeros identificados |
| med. | identification of major serious diseases | detección de grandes patalogías |
| chem. | In case of major fire and large quantities: | En caso de incendio importante y en grandes cantidades: |
| chem. | In case of major fire and large quantities: Evacuate area. Fight fire remotely due to the risk of explosion. | En caso de incendio importante y en grandes cantidades: Evacuar la zona. Luchar contra el incendio a distancia, dado el riesgo de explosión. |
| med. | laxator tympani major | ligamento de Toynbee (ligamentum mallei anterius) |
| med. | laxator tympani major | laxator tympani major (ligamentum mallei anterius) |
| med. | laxator tympani major | ligamento anterior tensor del martillo (ligamentum mallei anterius) |
| fin. | loan for major project | préstamo para proyecto de gran envergadura |
| environ. | major accident | accidentes mayores |
| health., environ. | major accident | accidente grave |
| health., environ. | major accident | accidente muy grave |
| environ. | major accident An unexpected occurrence, failure or loss beyond normal or specified levels with the potential for harming human life, property or the environment | accidentes mayores |
| mater.sc. | Major Accident Bureau | oficina de accidentes graves |
| insur. | major accident hazard | riesgo grave de accidente |
| environ., R&D. | Major-Accident Hazards Bureau | Oficina de Riesgos de Accidentes Graves |
| IT, industr. | major accident information system | sistema de informaciones sobre riesgos industriales |
| IT, environ. | major accident prevention policy | política de prevención de accidentes graves |
| IT, industr. | Major Accident Reporting System | sistema de informaciones sobre riesgos industriales |
| earth.sc. | major accidents reporting system | sistema de información sobre accidentes graves |
| energ.ind., el. | major actinides | actínidos mayores |
| health. | major active ingredient | principal ingrediente activo |
| environ., construct. | major activity centre | centro de actividades |
| med. | major agglutinin | aglutinina principal |
| med. | major agglutinin | aglutinina mayor |
| ed., agric. | major agricultural college | escuela media de agronomía |
| mil. | major air command | término que se refiere a cualesquiera de los mandos principales de la Fuerza Aérea, tales como el Comando Aéreo Continental y el Comando de Adiestramiento |
| mil. | major air command | comando aéreo principal |
| transp. | major alteration | modificación máxima |
| transp. | major alteration | modificación mayor |
| nat.sc. | major ampullate gland | glandula ampollacea mayor |
| environ., chem. | major anion | anión dominante |
| insur., pharma. | major appliance | gran aparato |
| insur., pharma. | major appliance | aparatos de importancia |
| med. | major arch | arco mayor |
| tech. | major assembly | conjunto principal |
| IT | major axes | ejes mayores |
| commun., IT | major axis | eje mayor |
| life.sc., transp. | major axis of orbit | gran eje de la orbita |
| commun., IT | major axis of the oblate raindrops | eje mayor de las gotas achatadas |
| IMF. | major borrowers | principales países prestatarios |
| mil. | major-caliber weapons | arma de gran calibre |
| tech. | major calorie | kilocaloría |
| commun. | major carrier alarm | alarma de portadoras mayoritarias |
| environ., chem. | major cation | catión dominante |
| environ., chem. | major cation | catión principal |
| gen. | major centres of economic and commercial activity | grandes polos de actividad económica y comercial |
| transp., mater.sc. | major check | inspección mayor |
| gen. | major chemical hazard | riesgo químico grave |
| med. | major chorea | corea histérica |
| med. | major chorea | corea mayor |
| IMF. | major classifications | principales clasificaciones (MBP5) |
| IMF. | major classifications | clasificaciones principales |
| fin. | major classifications | principales clasificaciones |
| gen. | major clearance | juego de la cresta |
| org.name. | Major Constituency Group Focal Point | Centro de coordinación de los principales sectores |
| UN, econ. | major construction | obras importantes |
| corp.gov. | major contributor | principal contribuyente |
| med. | major cornu | cuerno mayor |
| tech., mater.sc. | major defect | defecto principal |
| tech., mater.sc. | major defective | unidad con defectos principales |
| tech. | major defense equipment | equipo principal de la defensa |
| tech. | major defense equipment | equipo principal de defensa |
| health. | major depressive episode | episodio depresivo mayor |
| IT | major descriptor | descriptor mayor |
| meas.inst. | major diameter | diámetro mayor |
| meas.inst. | major diameter | diámetro exterior |
| gen. | major diameter external bolt thread | diámetro exterior de la rosca exterior |
| gen. | major diameter internal nut thread | diámetro exterior de la rosca interior |
| fin., environ. | major disaster | catástrofe grave |
| environ., ecol. | Major Economies Forum | Foro de las Principales Economías sobre Energía y Clima |
| environ., ecol. | Major Economies Forum on Energy and Climate | Foro de las Principales Economías sobre Energía y Clima |
| environ., ecol. | Major Economies Forum on Energy Security and Climate Change | Foro de las Principales Economías sobre Energía y Clima |
| agric. | major element | macroelementos |
| agric., chem. | major element | elemento mayor |
| agric. | major element | elementos nutritivos esenciales |
| environ. | Major Emergency Management brain project | proyecto MEMbrain |
| environ. | Major Emergency Management module | módulo MEM |
| health. | major envelope protein | proteína principal de la envoltura |
| med. | major epilepsy | gran mal |
| UN, tech. | major equipment | equipo pesado |
| UN, econ. | major equipment | equipo principal |
| UN, account. | major equipment review | examen periódico por concepto de equipo de propiedad de los contingentes |
| energ.ind. | major existing stationary source | gran fuente fija existente |
| stat., tech. | major failure | fallo mayor |
| construct. | major feature | característica principal |
| meas.inst. | major feedback | reacción principal |
| fishery | major fishing area | principal zona pesquera |
| fishery | major fishing area | zona de pesca principal |
| fishery | major fishing area | zona de importancia pesquera |
| fishery | major fishing area | principal zona de pesca |
| meteorol. | major flood | inundación catastrófica |
| meteorol. | major flood | crecida importante |
| transp. | major flow operator | operador importante de recorrido |
| agric. | major forest produce | renta principal |
| med. | major gene | oligogén |
| med. | major gene | gen mayor |
| gen. | Major General | General de División |
| tech. | major graduations | graduaciones principales |
| tech. | major graduations | divisiones principales de la escala |
| agric. | major harvest | corta de pies cortables |
| law | major health scourges | enfermedades más graves y ampliamente difundidas |
| health. | major health scourges | las enfermedades más graves y ampliamente difundidas |
| law | major health scourges | "enfermedades graves" |
| transp. | major highway | gran eje viario |
| med. | major histocompatibility antigen | antígeno mayor de histocompatibilidad |
| med. | major histocompatibility complex | complejo principal de histocompatibilidad |
| anim.husb. | major histocompatibility complex | CMH |
| health., nat.sc. | major histocompatibility complex | complejo histocompatibilidad |
| med., health., anim.husb. | major histocompatibility complex | complejo mayor de histocompatibilidad |
| med. | major histocompatibility complex restriction | restricción del CMH |
| fin. | major holding | participación significativa |
| fin. | major holding | participación importante |
| meteorol. | major hurricane | huracán mayor |
| meteorol. | major hurricane | huracán intenso |
| account. | major improvements | grandes mejoras |
| account. | major improvements to non-produced non-financial assets | grandes mejoras de activos no financieros no producidos |
| environ., industr. | major industrial accident hazard | riesgo de accidente grave resultante de la actividad industrial |
| IMF. | major industrial countries | principales países industriales |
| gen. | major infrastructure | grandes infraestructuras |
| baseb. | major leagues | ligas mayores |
| baseb. | major leagues | grandes ligas |
| transp. | major link of Community interest | grande enlace de interés comunitario |
| commun., IT | major lobe | lóbulo mayor |
| antenn. | major lobe | lóbulo principal |
| IT | major loop | bucle principal |
| meas.inst. | major loop | anillo principal |
| UN, econ. | major maintenance | trabajos importantes de mantenimiento |
| gen. | major manageable accident | accidente grave de efecto limitado AGEL |
| social.sc., health., UN | Major Medical Benefits Plan | Plan Complementario de Asistencia Médica |
| R&D. | Major NATO Command | Mando Principal de la OTAN |
| R&D. | Major NATO Command | Comandante Principal de la OTAN |
| el. | major network for the development of renewable energies | gran red para el desarrollo de las energías renovables |
| energ.ind. | major new stationary source | gran fuente fija nueva |
| tech. | major noun | nombre genérico |
| gen. | major number | número mayor |
| agric. | major nutrient | macroelementos |
| agric., chem. | major nutrient | elemento mayor |
| agric. | major nutrient | elementos nutritivos esenciales |
| law, crim.law. | major offence | delito menos grave |
| law, environ. | major offence | delito de una magnitud considerable |
| IMF. | major oil exporters | principales exportadores de petróleo |
| commun. | major outage | corte de servicio principal |
| corp.gov. | major output | producto principal |
| transp. | major overhaul | reparación general |
| transp. | major overhaul | revisión general |
| transp., mech.eng. | major overhaul | gran reparación |
| tech. | major overhaul | revisión y reparación general |
| el. | major parameters | parámetros fundamentales |
| econ. | major partner | principal asociado |
| el. | major path satellite | satélite de los trayectos principales |
| el. | major path satellite | satélite de arterias principales |
| acrid. | major plague | plaga importante |
| life.sc. | major planet | planeta principal |
| radio | major portion of the Earth's atmosphere | parte principal de la atmósfera terrestre |
| mater.sc., met. | major principal stress deviator | desviador principal de la tensión |
| agric. | major produce | renta principal |
| UN | major program | programa principal |
| stat. | major program components document | programa de operaciones principales censales |
| fin. | major programme | programa principal |
| transp., mil., grnd.forc. | major railway | gran eje ferroviario |
| econ. | major recession | importante recesión |
| gen. | major regional conflict | guerra a gran escala |
| tech. | major repair | gran reparación |
| avia., transp. | major repair | tercer escalon |
| tech. | major repair | reparación mayor |
| avia., transp. | major repair | mantenimiento |
| ed. | major requirements coursework | asignaturas especìficas de la carrera |
| environ. | major risk | riesgo importante |
| environ. | major risk The high probability that a given hazard or situation will yield a significant amount of lives lost, persons injured, damage to property , disruption of economic activity or harm to the environment; or any product of the probability of occurrence and the expected magnitude of damage beyond a maximum acceptable level | riesgo importante |
| environ. | major risk installation | instalación de gran riesgo |
| environ. | major risk installation Installations whose functioning involves the possibility of major hazards such as chemical plants, nuclear, coal and oil power production plants, etc. | instalación de gran riesgo |
| gov., sociol. | major risks insurance | seguro grandes riesgos |
| transp. | major road | carretera principal |
| transp. | major road | vía de gran circulación |
| transp. | major road | carretera de tránsito preferencial |
| transp. | major road | carretera preferente |
| transp. | major road | carretera de paso preferente |
| transp. | major road | vía preferente |
| transp. | major road | gran eje viario |
| transp. | major road | carretera de gran circulación |
| gen. | major seizures | embargos mayores |
| UN, polit. | major setback | importante revés |
| construct. | major storage dam | tramque |
| construct. | major storage dam | represa |
| construct. | major storage dam | presa alta |
| fishery | major stratum | estrato principal |
| transp., mil., grnd.forc. | major street | calle principal |
| gen. | major structural backwardness | importante atraso estructural |
| construct. | major structure | estructura principal |
| construct. | major structure | gran obra |
| gen. | Major Subordinate Command | Mando Subordinado Principal |
| gen. | Major Subordinate Command | Comandante Subordinado Principal |
| med. | major surgery | cirugía mayor |
| gen. | major theatre war | guerra a gran escala |
| comp., MS | major version | versión principal (A version that is ready for a larger group to see or that has changed significantly since the previous major version) |
| transp. | major waterways and rail axes | principales ejes fluviales y ferroviarios |
| nat.sc. | major wave | onda larga |
| nat.sc. | major wave | onda de Rossby |
| nat.sc. | major wave | onda planetaria |
| transp. | Major World Air Route Area | zona de paso de rutas aéreas mundiales principales |
| commun., IT | major world air route area | zona de paso de rutas aéreas mundiales principales |
| med. | muscle helicis major | músculo mayor del hélix |
| med. | muscle pectoralis major | músculo pectoral mayor |
| med. | muscle psoas major | músculo psoas mayor |
| med. | muscle rectus capitis anticus major | músculo recto anterior mayor de la Cabeza |
| med. | muscle rectus capitis posterior major | músculo recto posterior mayor de la cabeza |
| med. | muscle rhomboideus major | músculo romboides inferior |
| med. | muscle rhomboideus major | músculo romboides mayor |
| med. | muscle teres major | músculo teres major |
| med. | muscle teres major | músculo redondo mayor |
| med. | nerve petrosus superficialis major | nervio petroso superficial mayor |
| ed. | non-major single liberal arts program | programa único de humanidades sin concentración |
| ed. | non-major single liberal arts program | programa general |
| environ. | Open Partial Agreement on Major Hazards EUR-OPA | Acuerdo Parcial Abierto en materia de Prevención, de Protección y de Organización de los Socorros contra los Riesgos Naturales y Tecnológicos Mayores |
| gen. | Open Partial Agreement on Major Hazards EUR-OPA | Acuerdo EUR-OPA |
| gen. | Open Partial Agreement on Major Hazards EUR-OPA | Acuerdo del Consejo de Europa para Riesgos Mayores EUR-OPA |
| environ. | Open partial agreement on the prevention of, protection against, and organisation of relief in major natural and technological disasters | Acuerdo Parcial Abierto en materia de Prevención, de Protección y de Organización de los Socorros contra los Riesgos Naturales y Tecnológicos Mayores |
| gen. | Open partial agreement on the prevention of, protection against, and organisation of relief in major natural and technological disasters | Acuerdo del Consejo de Europa para Riesgos Mayores EUR-OPA |
| gen. | Open partial agreement on the prevention of, protection against, and organisation of relief in major natural and technological disasters | Acuerdo EUR-OPA |
| el. | operating major item | ítem mayor de explotación |
| health. | Organisation for Coordination and Cooperation in the Control of Major Endemic Diseases | Organización de Coordinación y Cooperación para la Lucha contra las Principales Endemias |
| med. | pelvis major | pelvis mayor (pelvis spuria) |
| med. | pelvis major | pelvis ancha (pelvis spuria) |
| med. | pelvis major | pelvis falsa (pelvis spuria) |
| mater.sc. | pilot programme on major technological hazards | programa piloto sobre riesgos tecnológicos graves |
| social.sc., UN | Recommendation concerning the prevention of major industrial accidents | Recomendación sobre la prevención de accidentes industriales mayores |
| life.sc. | region having a major commercial potential | región de gran potencial comercial |
| org.name. | Regional Expert Consultation on Hybrid Seed Production, Development and Security of Major Cereal Crops | Consulta regional de expertos sobre producción de semillas híbridas, desarrollo y seguridad de los principales cultivos de cereales |
| UN, econ. | section 32: Construction, alteration, improvement and major maintenance | sección 32: Construcción, reformas, mejoras y trabajos importantes de conservación |
| UN, econ. | section 31: Construction, alteration, improvement and major maintenance | sección 31: Construcción, reformas, mejoras y trabajos importantes de conservación |
| life.sc. | semi-major axis | eje semiprincipal |
| ichtyol. | sergeant major | petaca rayada Abudefduf saxatilis |
| gen. | Sergeant Major | Subteniente |
| polit. | Standing Committee for implementation of the directive on the control of major accidental hazards involving dangerous substances | Comité permanente de aplicación de la Directiva relativa al control de los riesgos inherentes a los accidentes graves en los que intervengan sustancias peligrosas |
| med. | thalassaemia major | síndrome de Cooley (thalassemia major) |
| med. | thalassemia major | síndrome de Cooley |
| fin., energ.ind. | transit of natural gas through the major systems | tránsito de gas natural en las grandes redes |
| cables | uniform major section | sección ternaria uniforme |
| law | vis major | fuerza mayor (force majeure) |
| gen. | width of basic major truncation | anchura del truncado de cresta |
| org.name. | Workshop on Major Issues in Improving Rice Productivity through Multilateral Cooperation | Taller sobre las principales cuestiones relacionadas con el mejoramiento de la productividad del arroz a través de la cooperación multilateral |
| construct., mun.plan. | World Association of the Major Metropolises | Asociación Mundial de las Grandes Metrópolis |
| med. | zygomatic major muscle | músculo cigomático mayor |
