internal sphincter muscle of anus n.
A smooth muscle ring formed by an increase of the circular fibers of the rectum, situated at the upper end of the anal canal.
noun 1. (in metal or glass pieces, or the like) a stress existing within the material as a result of thermal changes, having been worked, or irregularity of molecular structure.
- Internal thoracic vein
internal thoracic vein n. Either of usually two veins that accompany each internal thoracic artery, fusing together at the upper part of the chest and emptying into the brachiocephalic vein.
- Internal traction
internal traction n. A pulling force created by using one of the cranial bones, above the point of fracture, for anchorage.
- Internal translator
language, mathematics (IT) An early compiler for mathematics developed by A.J. Perlis et al at Carnegie Tech ca 1957. IT was originally written for the Burroughs 205, then the IBM 650. IT was the forerunner of RUNCIBLE, GATE, CORRELATE and GAT. IT source code was converted to PIT, thence to SPIT. IT-2 produced machine language […]