| Subject | English | Spanish |
| life.sc., el. | actual radius of the earth | radio terrestre real |
| life.sc., el. | actual radius of the earth | radio verdadero de la Tierra |
| life.sc., el. | actual radius of the earth | radio real de la Tierra |
| met. | an increase pressure decreases the value of the critical radius the nucleus | un aumento de la presión disminuye el valor del radio crítico del núcleo |
| med. | annular ligament of radius | ligamento orbicular (ligamentum annulare radii) |
| med. | annular ligament of radius | ligamento anular del radio (ligamentum annulare radii) |
| med. | anterior surface of radius | cara anterior del radio |
| meteorol. | baroclinic Rossby radius of deformation | radio de deformación de Rossby baroclínico |
| meteorol. | barotropic Rossby radius of deformation | radio de deformación de Rossby barotrópico |
| med. | condyle of the radius | extremo inferior del radio |
| med. | curvature radius of the humerus | radio de curvatura del húmero |
| transp. | curve of constant radius | curva de radio constante |
| transp. | curve of constant radius | curva circular |
| transp. | curve of small radius | curva de pequeño radio |
| transp. | curve of wide radius | curva de gran radio |
| transp., construct. | downstream radius of crest | radio aguas abajo de la coronación |
| med. | Duplay osteotomy of radius | osteotomía del radio de Duplay |
| earth.sc. | effect of finite Larmor radii | efecto de los radios finitos de Larmor |
| tech., construct. | effective radius of a well | radio efectivo de un pozo |
| el. | effective radius of curvature | radio de curvatura efectivo |
| el. | effective radius of the Earth | radio terrestre ficticio |
| el. | effective radius of the Earth | radio ficticio terrestre |
| el. | effective radius of the Earth | radio ficticio de la Tierra |
| life.sc., el. | effective radius of the Earth | radio verdadero de la Tierra |
| life.sc., el. | effective radius of the Earth | radio terrestre real |
| radio | effective radius of the Earth | radio equivalente de la tierra |
| life.sc., el. | effective radius of the Earth | radio real de la Tierra |
| life.sc., construct. | equilibrium radius of influence | radio de influencia de equilibrio |
| automat. | equivalent effective radius of a control rod | diámetro equivalente de una barra de regulación |
| transp. | fillet radius between the web and foot of the rail | acuerdo alma-patín |
| transp. | fillet radius between the web and head of the rail | acuerdo alma-cabeza |
| med. | fovea of head of radius | fóvea en la cabeza del radio |
| med. | head of radius | cabeza del radio |
| med. | interosseous space of the radius and ulna | espacio interóseo entre el cúbito y el radio |
| med. | interosseus crest of radius | cresta interósea del radio |
| met. | keyhole notch with a root radius of l mm | entalladura en forma de cerradura con un radio de curvatura en el fondo de la entalladura de 1 mm |
| med. | length of the radius | longitud máxima del radio |
| med. | length of the radius | longitud funcional del radio |
| nat.sc. | mean radius of curvature | radio medio de curvatura |
| nat.sc. | mean radius of curvature | radio de Gauss |
| med. | minimum circumference of the radius | circunferencia mínima del radio |
| med. | neck of radius | cuello del radio |
| transp. | nominal radius of steering control | radio nominal del mando de dirección |
| met. | radius faced tip of an electrode spherical | extremo abombado del electrodo |
| met. | radius faced tip of an electrode spherical | extremo esférico del electrodo |
| nautic. | radius of a circle | semidiámetro de un círculo |
| nautic. | radius of a circle | radio de un círculo |
| agric., chem. | radius of action | radio de acción |
| pack. | radius of curvature | radiode curvatura |
| transp. | radius of curvature | radio de curvatura |
| pack. | radius of curvature | radio de flexión |
| life.sc. | radius of curvature in a normal section | radio de curvatura en una sección normal |
| life.sc. | radius of curvature in a normal section | radio de curvatura de una paralela |
| life.sc. | radius of curvature in the meridian | radio de curvatura en el meridiano |
| life.sc. | radius of curvature in the prime vertical | radio de curvatura de una paralela |
| life.sc. | radius of curvature in the prime vertical | radio de curvatura en una sección normal |
| construct. | radius of curvature of deflection | radio de curvatura de la deflexión |
| mech.eng. | radius of drum | radio del tambor |
| transp., construct. | radius of extrados | radio del extradós |
| transp., mater.sc. | radius of gyration | radio de inercia |
| phys.sc. | radius of gyration | radio de giro |
| transp., mater.sc. | radius of inertia | radio de inercia |
| earth.sc., life.sc. | radius of influence | radio de influencia |
| transp., construct. | radius of intrados | radio del intradós |
| meteorol. | radius of 34 knot winds | radio de la zona con vientos de 34 nudos |
| meteorol. | radius of maximum winds | radio de vientos máximos |
| gen. | radius of nuclear reaction channel | radio del canal |
| tech., met. | radius of rounding of supports | radio de curvatura de los puntos de apoyo |
| tech. | radius of rupture | radio de ruptura |
| transp., construct. | radius of soffit | radio del intradós |
| tech., met. | radius of the interior and exterior edges of the blankholder | radio de los acuerdos interior y exterior de la matriz de embutición |
| life.sc., construct. | radius of the vertical curve | radio de la curva vertical |
| tech. | radius of turn | radio de viraje |
| transp., mech.eng. | radius of turning circle | diámetro del giro |
| transp., mech.eng. | radius of turning circle | círculo de la vuelta |
| transp., mech.eng. | radius of turning space | radio de viraje |
| transp., mech.eng. | radius of turning space | radio del giro |
| transp., mech.eng. | radius of turning space | espacio del viraje |
| tech. | radius of visibility | radio de visibilidad |
| life.sc., el. | real radius of the earth | radio verdadero de la Tierra |
| life.sc., el. | real radius of the earth | radio terrestre real |
| life.sc., el. | real radius of the earth | radio real de la Tierra |
| meteorol. | Rossby radius of deformation | radio de deformación de Rossby |
| med. | shaft of radius | cuerpo del radio |
| met. | transition radius between the parallel portion of the test piece and the grip heads | acuerdo entre la porcion paralela de la probeta y las cabezas de sujecion |
| med. | tuberosity of radius | tuberosidad bicipital (tuberositas radii) |
| med. | tuberosity of radius | tuberosidad radial (tuberositas radii) |
| med. | ulnar notch of radius | escotadura cubital del radio (incisura ulnaris radii) |
| transp., construct. | upstream radius of crest | radio aguas arriba de la coronación |
| mater.sc., met. | variation of circumferential stress with radius and time | variación de la tensión circunferencial en función del radio y del tiempo |