Meaning of antiperistalsis

an•ti•per•i•stal•sis

Pronunciation: (an"tē-per"i-stôl'sis, -stal'-, an"tī-), [key]
— n. Physiol.
  1. reversed peristaltic action of the intestines, by which their contents are carried upward.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.