| Subject | English | French |
| life.sc., el. | actual radius of the earth | rayon terrestre réel |
| life.sc., el. | actual radius of the earth | rayon réel de la terre |
| met. | an increase pressure decreases the value of the critical radius the nucleus | une augmentation de pression diminue la valeur du rayon critique du germe |
| med. | annular ligament of radius | ligament annulaire du coude (ligamentum annulare radii) |
| med. | annular ligament of radius | ligament annulaire du radius (ligamentum annulare radii) |
| med. | anterior surface of radius | face antérieure du radius |
| avia., Canada | arc of constant radius | arc de rayon constant |
| med. | articular circumference of radius | pourtour de la tête du radius |
| med. | articular circumference of radius | bourrelet péri-articulaire de la tête radiale |
| commun., transp. | average radius of rated coverage | rayon moyen de la couverture nominale |
| tech., mech.eng. | bore mouth radius of a die | rayon d'entrée d'une matrice |
| med. | condyle of the radius | extrémité inférieure du radius |
| med. | curvature radius of the humerus | rayon de courbure de l'humérus |
| transp. | curve of constant radius | courbe à rayon constant |
| transp. | curve of constant radius | courbe circulaire |
| transp. | curve of small radius | courbe de petit rayon |
| transp. | curve of small radius | courbe de faible rayon |
| transp. | curve of wide radius | courbe de grand rayon |
| transp., construct. | downstream radius of crest | rayon aval en crète |
| med. | Duplay osteotomy of radius | opération de Duplay |
| earth.sc. | effect of finite Larmor radii | effet des rayons de Larmor finis |
| tech., construct. | effective radius of a well | rayon effectif d'un puits |
| el. | effective radius of curvature | rayon de courbure équivalent |
| el. | effective radius of the Earth | rayon terrestre équivalent |
| el. | effective radius of the Earth | rayon terrestre fictif |
| life.sc., el. | effective radius of the Earth | rayon terrestre réel |
| life.sc., el. | effective radius of the Earth | rayon réel de la terre |
| life.sc., construct. | equilibrium radius of influence | rayon d'appel d'équilibre |
| automat. | equivalent effective radius of a control rod | diamètre équivalent d'une barre de commande |
| transp. | fillet radius between the web and foot of the rail | congé de raccord âme-patin du rail |
| transp. | fillet radius between the web and head of the rail | congé de raccord âme-champignon du rail |
| med. | fovea of head of radius | cupule radiale |
| transp., tech. | front fitting radius of semi-trailer | rayon d'encombrement avant de la semi-remorque |
| tech., mech.eng. | gorge radius of a cylindrical worm wheel | rayon de gorge d'une roue à vis cylindrique |
| med. | head of radius | tete du radius |
| met. | inside radius of the bend | rayon intérieur du pli |
| med. | interosseous space of the radius and ulna | espace interosseux de l'avant-bras |
| med. | interosseus crest of radius | crête interosseuse du radius |
| met. | keyhole notch with a root radius of l mm | entaille en trou de serrure avec un rayon à fond d'entaille de l mm |
| med. | lateral surface of radius | face externe du radius |
| med. | length of the radius | plus grande longueur du radius |
| med. | length of the radius | longueur fonctionnelle du radius |
| tech., mech.eng. | lip radius of a renewable bush | rayon du logement du tenon ou de la vis |
| tech., mech.eng. | lip radius of a renewable bush | rayon du logement de la bride ou de la vis |
| transp., tech. | lower fitting radius of semi-trailer | rayon inférieur d'encombrement de la semi-remorque |
| tech., mech.eng. | lower washer face external radius of a die | rayon extérieur de l'embrèvement inférieur d'une matrice |
| tech., mech.eng. | lower washer face internal radius of a die | rayon intérieur de l'embrèvement inférieur d'une matrice |
| nat.sc. | mean radius of curvature | rayon de courbure de Gauss |
| med. | minimum circumference of the radius | plus petite circonférence du radius |
| transp., mil., grnd.forc. | minimum radius of curvature | rayon de courbure minimal |
| transp. | minimum radius of curvature | rayon de courbure horizontal minimum |
| transp. | minimum radius of vertical curve | rayon de courbure vertical minimum |
| med. | neck of radius | col du radius |
| transp. | nominal radius of steering control | rayon nominal de la commande de direction |
| med. | posterior surface of radius | face postérieure du radius |
| transp., mil., grnd.forc., tech. | radii of vertical curvatures | rayon du carénage des capsules et des cuves |
| gear.tr. | radius at end of involute profile | rayon d'extrémité du profil en développante |
| met. | radius faced tip of an electrode spherical | extremite d electrode bombee |
| athlet. | radius line of sector | limite de côté du secteur |
| construct. | radius of a circle | rayon d'un cercle |
| transp., construct. | radius of a curve | rayon d'une courbe |
| tech., mech.eng. | radius of a grinding wheel | rayon d'une meule |
| agric., chem. | radius of action | spectre d'efficacité |
| med.appl. | radius of action | élongation |
| agric., chem. | radius of action | spectre d'activité |
| transp., avia. | radius of action | rayon d'action |
| agric., chem. | radius of action | spectre d'action |
| transp., construct. | radius of action of a machine | rayon d'action d'un appareil |
| tech. | radius of bending cylinders | rayon des cylindres de pliage |
| industr., construct. | radius of char | rayon de brûlure charbonnante |
| tech. | radius of convergence | rayon de convergence |
| transp., mil., grnd.forc., tech. | radius of curvature | rayon d'une courbe |
| transp. | radius of curvature | rayon de courbure |
| gear.tr. | profile radius of curvature | rayon de courbure du profil de dent |
| tech., industr., construct. | radius of curvature | rayon de cintrage |
| pack. | radius of curvature | rayon de flexion |
| life.sc. | radius of curvature in a normal section | rayon de courbure d'une section normale |
| life.sc. | radius of curvature in a normal section | rayon de courbure d'un parallèle |
| life.sc. | radius of curvature in the meridian | rayon de courbure méridienne |
| life.sc. | radius of curvature in the prime vertical | rayon de courbure d'un parallèle |
| life.sc. | radius of curvature in the prime vertical | rayon de courbure d'une section normale |
| construct. | radius of curvature of deflection | rayon de courbure de la déflexion |
| mun.plan., earth.sc. | radius of diffusion | rayon de diffusion |
| mech.eng. | radius of drum | rayon de tambour |
| tech., mech.eng. | radius of edge | rayon du taillant |
| construct. | radius of enterprise influence | rayon de l'influence d'une entreprise |
| tech., mech.eng. | radius of entry chamfer | rayon du chanfrein d'entrée |
| tech., mech.eng. | radius of entry chamfer | longueur du chanfrein d'entrée |
| transp., construct. | radius of extrados | rayon d'extrados |
| construct. | radius of giration gyration | rayon de giration |
| transp., mater.sc. | radius of gyration | rayon d'inertie |
| phys.sc. | radius of gyration | rayon de giration |
| transp., mater.sc. | radius of inertia | rayon d'inertie |
| astr. | radius of inertia | rayon de giration |
| earth.sc., life.sc. | radius of influence | rayon d'appel |
| transp., construct. | radius of intrados | rayon d'intrados |
| anal.chem. | radius of ionic atmosphere | rayon de l’atmosphère ionique |
| gen. | radius of nuclear reaction channel | rayon du canal |
| gen. | radius of nuclear reaction channel | rayon du canal de la réaction nucléaire |
| tech., mech.eng. | radius of raised portion | rayon du bombé |
| earth.sc., transp. | radius of rotation | rayon de rotation |
| tech., mech.eng. | radius of rounded end | rayon du bombé |
| met. | radius of rounding | rayon de l'arrondi |
| tech., met. | radius of rounding of supports | rayon des arrondis des appuis |
| gen. | radius of safety | rayon de sécurité |
| construct. | radius of service | rayon de service |
| transp. | radius of sharpest bends | rayon minimal des courbes |
| transp., construct. | radius of soffit | rayon d'intrados |
| met. | radius of the dome of the indentor | rayon de la calotte du pénétrateur |
| chem. | radius of the exterior edge | rayon du congé extérieur |
| paleont. | radius of the fourth order | subradius |
| earth.sc. | radius of the helical path | rayon de la trajectoire hélicoidale |
| tech., met. | radius of the interior and exterior edges of the blankholder | rayon des congés intérieur et extérieur du serre-flan |
| chem. | radius of the interior edge | rayon du congé intérieur |
| met. | radius of the knife | rayon de l'arête du couteau |
| paleont. | radius of the second order | interradius |
| paleont. | radius of the third order | adradius |
| astr. | radius of the universe | rayon de l'univers |
| life.sc., construct. | radius of the vertical curve | rayon de la courbe de raccordement |
| construct. | radius of torsion | rayon de torsion |
| transp., mech.eng. | radius of turning circle | rayon de braquage |
| transp., mech.eng. | radius of turning circle | espace de rayon de braquage |
| transp., mech.eng. | radius of turning circle | diamètre de braquage |
| transp., mech.eng. | radius of turning space | espace de virage |
| transp., mech.eng. | radius of turning space | rayon de l'espace de virage |
| transp., mech.eng. | radius of turning space | rayon de virage |
| transp., mech.eng. | radius of turning space | espace d'encombrement en virage |
| construct. | radius of well influence | rayon de l'influence d'un puits |
| life.sc., el. | real radius of the earth | rayon réel de la terre |
| life.sc., el. | real radius of the earth | rayon terrestre réel |
| transp., tech. | rear tractor clearance radius of semi-trailer | rayon inférieur d'encombrement de la semi-remorque |
| tech., mech.eng. | root radius of a parallel screw thread | rayon à fond de filet d'un filetage triangulaire cylindrique |
| med. | shaft of radius | corps du radius |
| transp., polit. | still air radius of turn | rayon de virage en air calme |
| transp., tech. | theoretical running radius of tyre | rayon de roulement théorique du pneu |
| met. | transition radius between the parallel portion of the test piece and the grip heads | congé de raccordement entre la partie calibrée de l'éprouvette et les têtes d'amarrage |
| med. | tuberosity of radius | tubérosité bicipitale du radius (tuberositas radii) |
| med. | ulnar notch of radius | cavité sigmoïde du radius (incisura ulnaris radii) |
| tech., mech.eng. | upper washer face external radius of a die | rayon extérieur de l'embrèvement supérieur d'une matrice |
| tech., mech.eng. | upper washer face internal radius of a die | rayon intérieur de l'embrèvement supérieur d'une matrice |
| transp., construct. | upstream radius of crest | rayon amont en crète |
| mater.sc., met. | variation of circumferential stress with radius and time | variation de la tension circonférentielle en fonction du rayon et du temps |