Meaning of simethicone

si•meth•i•cone

Pronunciation: (sī-meth'i-kōn"), [key]
— n. Pharm.
  1. an active ingredient in many antacid preparations that causes small mucus-entrapped air bubbles in the intestines to coalesce into larger bubbles that are more easily passed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.