| RK | rabbit kidney; radial keratotomy; reductase kinase; rhodopsin kinase; right kidney |
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| RL | radial line; radiation laboratory; reduction level; renal dysplasia-limb defects [syndrome]; resisti... |
| RP | radial pulse; radiopharmaceutical; rapid processing [of film]; Raynaud phenomenon; reactive protein;... |
| RPA | radial photon apsorptiometry; replication protein A; resultant physiologic acceleration; reverse pas... |
| SBRN | sensory branch of radial nerve |
| ganglionic crest | A group of embryonic cells that separate from the neural plate during neurulation and migrate to give several different lineages of adult cells: the spinal and autonomic ganglia, the glial cells of the peripheral nervous system and nonneuronal cells, such as chromaffin cells, melanocytes and some haemopoietic cells. (18 Nov 1997) |
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| marginal crest | The rounded borders which form the mesial and distal margins of the occlusal surface of a tooth. Synonym: crista marginalis, marginal ridge. (05 Mar 2000) |
| vestibular crest | <anatomy> An oblique ridge on the inner wall of the vestibule of the labyrinth, bounding the spherical recess above and posteriorly. Synonym: crista vestibuli. (05 Mar 2000) |
| gingival crest | The most coronal portion of the gingiva surrounding the tooth, the edge of the free gingiva. Synonym: cervical margin, gingival crest. (05 Mar 2000) |
| medial crest of fibula | A ridge of bone, on the posterior surface of the fibula, separating the attachment of the posterior tibial muscle from that of the flexor hallucis longus and soleus muscles. Synonym: crista medialis fibulae. (05 Mar 2000) |
| medial epicondylar crest | The distal sharp portion of the medial margin of the humerus. Synonym: crista supracondylaris medialis, medial epicondylar crest, medial epicondylar ridge, medial supracondylar crest. (05 Mar 2000) |
| medial supracondylar crest | The distal sharp portion of the medial margin of the humerus. Synonym: crista supracondylaris medialis, medial epicondylar crest, medial epicondylar ridge, medial supracondylar crest. (05 Mar 2000) |
| median sacral crest | An unpaired crest formed by the fused spinous processes of the upper four sacral vertebrae. Synonym: crista sacralis mediana. (05 Mar 2000) |
| gluteal crest | The point of insertion on the upper portion of the shaft of the femur of the greater part of the gluteus maximus muscle; when markedly developed this tuberosity is called the third trochanter. Synonym: trochanter tertius, tuberositas glutea, crista glutea, gluteal crest, gluteal ridge. (05 Mar 2000) |
| conchal crest | Bony ridge which articulates with, or provides attachment for, the inferior nasal concha. See: conchal crest of maxilla, conchal crest of palatine bone. Synonym: crista conchalis, turbinated crest. (05 Mar 2000) |
| conchal crest of maxilla | Ridge of the nasal surface of the body of the maxilla that articulates with the inferior nasal concha. Synonym: crista conchalis maxillae. (05 Mar 2000) |
| conchal crest of palatine bone | The ridge on the nasal surface of the perpendicular part of the palatine bone to which the inferior nasal concha attaches. Synonym: crista conchalis ossis palatini. (05 Mar 2000) |
| crest | 1. A ridge, especially a bony ridge. See: crista. 2. The ridge of the neck of a male animal, especially of a stallion or bull. 3. Feathers on the top of a bird's head, or fin rays on the top of a fish's head. Synonym: crista. Origin: L. Crista (05 Mar 2000) |
| crest of alveolar ridge | The top of the alveolar ridge or residual ridge; the highest continuous surface of the ridge, but not necessarily the centre of the ridge. (05 Mar 2000) |
| crest of cochlear opening | The edge of the opening of the cochlear window to which the secondary tympanic membrane is attached. Synonym: crista fenestrae cochleae, crest of cochlear opening. (05 Mar 2000) |