| REA | radiation emergency area; radioenzymatic assay; renal anastomosis; right ear advantage |
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| RJA | regurgitant jet area |
| RMA | rapid membrane assay; refuses medical advice; Registered Medical Assistant; relative medullary area;... |
| SA | salicylic acid; saline [solution]; salt added; sarcoidosis; sarcoma; scalenus anticus; secondary ame... |
| SMA | sequential multiple analysis or analyzer; sequential multichannel autoanalyzer; simultaneous multich... |
| paries posterior vaginae | It is longer than the anterior wall and has a low ridge in the midline throughout most of its length. Synonym: paries posterior vaginae. (05 Mar 2000) |
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| rectus capitis posterior major | <anatomy, muscle> Origin, spinous process of axis; insertion, middle of inferior nuchal line of occipital bone; action, rotates and draws head backward; nerve supply, dorsal branch of first cervical (suboccipital). See: suboccipital muscles. Synonym: musculus rectus capitis posterior major, greater posterior rectus muscle of head, musculus rectus capitis posticus major. (05 Mar 2000) |
| rectus capitis posterior minor | <anatomy, muscle> Origin, from posterior tubercle of atlas; insertion, medial third of inferior nuchal line of occipital bone; action, rotates head and draws it backward; nerve supply, dorsal branch of first cervical (suboccipital). See: suboccipital muscles. Synonym: musculus rectus capitis posterior minor, musculus rectus capitis posticus minor, smaller posterior rectus muscle of head. (05 Mar 2000) |
| mastoid branches of posterior auricular artery | <anatomy, artery> Branches from stylomastoid branch of posterior auricular artery arising within the facial canal, distributed to the mastoid air cells. Synonym: rami mastoidei arteriae auricularis posterioris. (05 Mar 2000) |
| pars posterior commissurae anterioris | <anatomy> The posterior portion of the anterior commissure of the brain. (05 Mar 2000) |
| pars posterior faciei diaphragmatis hepatis | That portion of the diaphragmatic surface of the liver that includes the bare area and the caudate lobe. Synonym: pars posterior faciei diaphragmatis hepatis. (05 Mar 2000) |
| pars posterior fornicis vaginae | The recess at the vault of the vagina; it is divided into an anterior part, posterior part, and lateral part with respect to its relation to the cervix of the uterus. The posterior part is clinically significant as the site for culdocentesis and culdoscopy. The proximity of the ureter (below) and the uterine artery (above) adjacent to the lateral fornix is important clinically. Synonym: fornix vaginae, fornix uteri. (05 Mar 2000) |
| pars tibiotalaris posterior ligamenti medialis | <anatomy> The part of the medial or deltoid ligament that extends from the medial malleolus to the posterior process of the talus. Synonym: pars tibiotalaris posterior ligamenti medialis, ligamentum talotibiale posterius, posterior talotibial ligament, posterior tibiotalar part of deltoid ligament. (05 Mar 2000) |
| regio antebrachialis posterior | The area between the radial and ulnar borders of the forearm posteriorly. Synonym: regio antebrachialis posterior, facies antebrachialis posterior, posterior antebrachial region, posterior surface of forearm. (05 Mar 2000) |
| regio brachialis posterior | The back of arm. Synonym: facies brachialis posterior, regio brachialis posterior, posterior brachial region, posterior surface of arm. (05 Mar 2000) |
| regio carpalis posterior | The posterior part of the wrist. Synonym: regio carpalis posterior. (05 Mar 2000) |
| regio cervicalis posterior | The back of neck, including the suboccipital region. Synonym: regio nuchalis, nuchal region, posterior neck region, regio cervicalis posterior. (05 Mar 2000) |
| regio cruralis posterior | The back of the leg. Synonym: regio cruralis posterior, posterior crural region, posterior surface of leg. (05 Mar 2000) |
| regio cubitalis posterior | The back of the elbow. Synonym: facies cubitalis posterior, regio cubitalis posterior, posterior cubital region, posterior surface of elbow. (05 Mar 2000) |
| regio femoralis posterior | The back of the thigh. Synonym: facies femoralis posterior, posterior surface of thigh, regio femoralis posterior. (05 Mar 2000) |