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Meaning of diquat

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.