| 'Greek letter alpha' | angular acceleration; first [carbon atom next to the carbon atom bearing the active group in organic... |
|---|---|
| C1a | activated first component of complement |
| C1 INH | inhibitor of first component of complement |
| CI | first cranial nerve |
| CN | I to XII first to twelfth cranial nerves |
| pyramidal fracture | A fracture of the midfacial skeleton with the principal fracture lines meeting at an apex at or near the superior aspect of the nasal bones. Synonym: Le Fort II fracture. (05 Mar 2000) |
|---|---|
| seymour fracture | <radiology> Juxta-epiphyseal fracture of the distal phalanx of the finger (12 Dec 1998) |
| shepard fracture | <radiology> Fracture of the lateral tubercle of the posterior process of the talus (12 Dec 1998) |
| Shepherd's fracture | A fracture of the external tubercle (posterior process) of the talus, sometimes mistaken for a displacement of the os trigonum. (05 Mar 2000) |
| sideswipe elbow fracture | <radiology> Comminuted fracture of the distal humerus, due to direct trauma (elbow in car window hits approaching vehicle) (12 Dec 1998) |
| silver-fork fracture | A Colles' fracture of the wrist in which the deformity has the appearance of a fork in profile. (05 Mar 2000) |
| simple fracture | A fracture in which skin is intact at site of fracture. Synonym: simple fracture. (05 Mar 2000) |
| simple skull fracture | Fracture with intact overlying scalp and/or mucous membranes. Synonym: simple skull fracture. (05 Mar 2000) |
| Skillern's fracture | Fracture of distal radius with greenstick fracture of neighboring portion of ulna. (05 Mar 2000) |
| skull fracture | <orthopaedics> A injury to the cranium with sufficient force to fracture one of the bones with comprise the skull. The temporal bone is the most often fractured. See: head injury. (27 Sep 1997) |
| Smith's fracture | <orthopaedics> A fracture of the radius at the wrist that results in volar (palmar) angulation of the distal fracture fragment, opposite the Colles fracture. (27 Sep 1997) |
| spine fracture | A break in the bony cortex of the vertebrae. Spine fractures must be assessed as stable or unstable. Unstable spine fractures pose a risk of spinal cord injury due to abnormal movement at the fracture site. (27 Sep 1997) |
| spiral fracture | A fracture the line of which is helical in the bone. (05 Mar 2000) |
| splintered fracture | A comminuted fracture in which the fragments are long and sharp-pointed. (05 Mar 2000) |
| spontaneous fracture | A fracture occurring without any external injury. (05 Mar 2000) |