/ Dictionary / Index D diazonium compound: Meaning and Definition of Find definitions for: diazo'nium com'pound Pronunciation: [key] — Chem. Chem. any of a series of compounds that contain the group ArN–, in which Ar represents an aryl group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diazonium diazonium salt Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language