Dictionary.com
definitions

antiperistalsis

[an-tee-per-i-stawl-sis, -stal-, an-tahy-]
noun Physiology.
  1. reversed peristaltic action of the intestines, by which their contents are carried upward.

Origin of antiperistalsis

anti- + peristalsis
Related formsan·ti·per·i·stal·tic [an-tee-per-i-stal-tik, an-tahy-] /ˌæn tiˌpɛr ɪˈstæl tɪk, ˌæn taɪ-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for antiperistalsis

antiperistalsis

noun physiol
  1. contractions of the intestine that force the contents in the opposite direction to the normal
Derived Formsantiperistaltic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
antiperistalsis in Medicine

antiperistalsis

[ăn′tē-pĕr′ĭ-stôl′sĭs, -stăl′-, ăn′tī-]
n.
  1. reversed peristalsis
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.