/ Dictionary / Index D diphenamid: Meaning and Definition of Find definitions for: di•phen•a•mid Pronunciation: (dī-fen'u-mid), [key] — n. a selective preemergence herbicide, CHON, used to control weed growth on lawns and various croplands. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diphase diphenhydramine Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language