diquat: Meaning and Definition of

di•quat

Pronunciation: (dī'kwot), [key]
— n.
  1. a yellow crystalline substance, CHBrN, used as a selective postemergence herbicide to control weeds on noncrop land and for aquatic weed control.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.