| rad | radiation absorbed dose; radial; radian; radical; radius; root [Lat. radix] |
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| RCM | radial contour model; radiographic contrast medium; red cell mass; reinforced clostridial medium; re... |
| RD | radial deviation; radiology department; rate difference; Raynaud disease; reaction of degeneration; ... |
| REAR | renal, ear, anal, and radial [malformation syndrome] |
| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
| SRID | Single Radial Immunodiffusion |
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| SRD | Single radial immunodiffusion |
| RGP | radial growth phase |
| surgical neck of humerus | The narrow portion below the head and tuberosities. Synonym: collum chirurgicum humeri. (05 Mar 2000) |
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| trochlea of humerus | The grooved surface at the lower end of the humerus articulating with the trochlear notch of the ulna. Synonym: trochlea humeri, pulley of humerus. (05 Mar 2000) |
| lateral border of humerus | The ridge on the humerus that extends from the greater tubercle to the lateral epicondyle. Synonym: margo lateralis humerii. (05 Mar 2000) |
| lateral epicondyle of humerus | The epicondylus situated at the lateral side of the distal end of the bone. Synonym: epicondylus lateralis humeri. (05 Mar 2000) |
| lesser tubercle of humerus | The anterior of the two tubercles of the neck of the humerus on which the subscapularis is inserted. Synonym: tuberculum minus humeri, lesser tuberosity of humerus. (05 Mar 2000) |
| lesser tuberosity of humerus | The anterior of the two tubercles of the neck of the humerus on which the subscapularis is inserted. Synonym: tuberculum minus humeri, lesser tuberosity of humerus. (05 Mar 2000) |
| little head of humerus | The small rounded eminence on the lateral half of the distal end of the humerus for articulation with the radius. Synonym: capitulum humeri, capitellum, little head of humerus. (05 Mar 2000) |
| radial | <botany> Of or pertaining to a radius or ray; consisting of, or like, radii or rays; radiated; as, the radial artery. Radial symmetry. <biology> See Symmetry. Origin: Cf. F. Radial. See Radius. Source: Websters Dictionary (01 Mar 1998) |
| radial acceleration | The centripetal acceleration of a particle or vehicle moving along a curved path at a constant velocity; e.g., turning a curve in an automobile, pulling out of a dive, or performing a loop manoeuvre in an aircraft. In aviation, acceleration varies directly with the square of the air speed and inversely with the radius of the turn (a = V2/r, where V is air speed and r is radius of turn). (05 Mar 2000) |
| radial aplasia-thrombocytopenia syndrome | <syndrome> Aplasia (absence) of the radius (the long bone on the thumb-side of the forearm) and thrombocytopenia (low blood platelets) are key features characterizing this syndrome. There is phocomelia (flipper-limb) with the thumbs always present. The fibula (the smaller bone in the lower leg) is often absent. The risk of bleeding from too few platelets is high in early infancy but lessens with age. The condition is inherited in an autosomal recessive trait with one gene (on a non-sex chromosome) coming from each parent to the child affected with the disease. Alternative names include thrombocytopenia-absent radius syndrome, tar syndrome, and tetraphocomelia-thrombocytopenia syndrome. (12 Dec 1998) |
| radial artery | <anatomy, artery> The direct continuation of the brachial trunk, originating at the bifurcation of the brachial artery opposite the neck of the radius. Its branches may be divided into three groups corresponding to the three regions in which the vessel is situated, the forearm, wrist, and hand. (12 Dec 1998) |
| radial border of forearm | An imaginary line running along the outermost extent of the forearm separating anterior and posterior surfaces laterally. Synonym: margo lateralis antebrachii, margo radialis antebrachii, radial border of forearm. (05 Mar 2000) |
| radial bursa | <anatomy> The synovial sheath that envelops the tendon of the flexor pollicis longus in its course through the carpal canal; it is continuous with the digital sheath of the thumb, the two generally being considered as one sheath. Synonym: vagina tendinis musculi flexoris pollicis longi, radial bursa. (05 Mar 2000) |
| radial clubhand | Clubhand with angular deviation towards radial side of limb. See: manus valga. (05 Mar 2000) |
| radial collateral artery | <anatomy, artery> The anterior terminal branch of the profunda brachii, anastomosing with the radial recurrent, forming part of the articular network of the elbow. Synonym: arteria collateralis radialis. (05 Mar 2000) |