Noun
Peristaltic contraction or action.
Source: Webster's dictionaryThe pyloric sphincter controls the passage of partially digested food ( chyme ) from the stomach into the duodenum where peristalsis takes over to move this through the rest of the intestines. Source: Internet
Physiology Blood vessels do not actively engage in the transport of blood (they have no appreciable peristalsis ), but arteries—and veins to a degree—can regulate their inner diameter by contraction of the muscular layer. Source: Internet