/ Dictionary / Index A acridine: Meaning and Definition of Find definitions for: ac•ri•dine Pronunciation: (ak'ri-dēn", -din), [key] — n. Chem. a colorless, crystalline solid, CHN, usually obtained from the anthracine fraction of coal tar: used chiefly in the synthesis of dyes and drugs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acridid acriflavine Related Content Daily Word Quiz: drowsy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language