Meaning of antinutrient

an•ti•nu•tri•ent

Pronunciation: (an"tē-n'trē-unt, -ny'-, an"tī-), [key]
— n. Biochem.
  1. a substance that interferes with the utilization of one or more nutrients by the body, as oxalate and phytate, which prevent calcium absorption.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.