| RSO | radiation safety officer; Resident Surgical Officer; right superior oblique [muscle] |
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| RSR | regular sinus rhythm; relative survival rate; right superior rectus [muscle] |
| RSVC | right superior vena cava |
| SC | conditioned stimulus; sacrococcygeal; Sanitary Corps; scalenus [muscle]; scapula; Schwann cell; scia... |
| SCA | self-care agency; severe congenital anomaly; sickle-cell anemia; single-camera autostereoscopic [ima... |
| Meckel's ligament | The portion of the anterior ligament of the malleus that extends from the base of the anterior process through the petrotympanic fissure, to attach to the spine of the sphenoid. See: anterior ligament of malleus. Synonym: Meckel's ligament. (05 Mar 2000) |
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| medial arcuate ligament | <anatomy> One of Haller's arches; a tendinous thickening of the psoas fascia that extends from the body of the first lumbar vertebra to its transverse process on either side. A portion of the diaphragm arises from it. Synonym: ligamentum arcuatum mediale, arcus lumbocostalis medialis, medial lumbocostal arch. (05 Mar 2000) |
| medial collateral ligament, knee | A broad, flat, longitudinal band on the medial side of the knee joint. It is attached superiorly to the medial epicondyle of the femur, inferiorly to the medial surface of the body of the tibia, and in between to the medial meniscus. It is a frequent site of injury, particularly rupture and tear. (12 Dec 1998) |
| medial collateral ligament of elbow | The triangular ligament extending from the medial epicondyle of the humerus to the medial side of the coronoid process and olecranon of the ulna. Synonym: ligamentum collaterale ulnare, medial collateral ligament of elbow, ulnar collateral ligament. (05 Mar 2000) |
| medial ligament | <anatomy> The bundle of fibres strengthening the medial part of the articular capsule of the temporomandibular joint. Synonym: ligamentum mediale articulationis temporomandibularis. (05 Mar 2000) |
| medial ligament of knee | <anatomy> The broad fibrous band that passes from the medial epicondyle of the femur to the medial margin and medial surface of the tibia; the medial meniscus is attached to its deep surface; it is continuous with (a thickening of) the fibrous capsule of the knee joint. Synonym: ligamentum collaterale tibiale, medial ligament of knee. (05 Mar 2000) |
| medial ligament of talocrural joint | <anatomy> Compound ligament consisting of four component ligaments which pass downward from the medial malleolus of the tibia to the tarsal bones: 1) tibionavicular ligament (pars tibionavicularis ), 2) tibiocalcaneal ligament (pars tibiocalcanea ), 3) anterior tibiotalar ligament (pars tibiotalaris anterior ), and 4) posterior tibiotalar ligament (pars tibiotalaris posterior ). Synonym: ligamentum mediale articulationis talocruralis, ligamentum deltoideum, medial ligament of talocrural joint. (05 Mar 2000) |
| medial ligament of wrist | A ligament that passes from the styloid process of the ulna to the pisiform and triquetrum. Synonym: ligamentum collaterale carpi ulnare, internal collateral ligament of the wrist, medial ligament of wrist. (05 Mar 2000) |
| glossoepiglottic ligament | <anatomy> An elastic ligamentous band passing from the base of the tongue to the epiglottis in the middle glossoepiglottic fold. (05 Mar 2000) |
| medial palpebral ligament | <anatomy> The fibrous band that attaches the medial ends of the tarsal plates to the maxilla at the medial orbital margin. Synonym: ligamentum palpebrale mediale, ligamentum tarsale internum, tendo oculi, tendo palpebrarum. (05 Mar 2000) |
| medial puboprostatic ligament | See: puboprostatic ligament. Synonym: medial puboprostatic ligament. (05 Mar 2000) |
| medial talocalcaneal ligament | <anatomy> A ligament extending from the medial tuberosity of the posterior talar process and the sustentaculum tali. Synonym: ligamentum talocalcaneare mediale. (05 Mar 2000) |
| medial umbilical ligament | <anatomy> The obliterated umbilical artery that persists as a fibrous cord passing upward alongside the bladder to the umbilicus. Synonym: ligamentum umbilicale mediale. (05 Mar 2000) |
| median arcuate ligament | <anatomy> A tendinous connection between the crura of the diaphragm that arches over the aorta, forming the anterosuperior margin of the aortic hiatus. Synonym: ligamentum arcuatum medianum. (05 Mar 2000) |
| median thyrohyoid ligament | <anatomy> The central thickened portion of the thyrohyoid membrane. Synonym: ligamentum thyrohyoideum medianum, ligamentum hyothyroideum medium. (05 Mar 2000) |