Peristaltic /(?)/

Per·i·stal·tic

Peristaltic

a.
  1. Pertaining to a wormlike wave motion of the intestines, and by analogy, of other flexible tubular structures. In the body it is produced by a progressive contraction of the muscular fibers of their walls, forcing their contents onwards in the direction of the wave; as, peristaltic movement. (Physiol.)