/ Dictionary / Index A antihistaminic: Meaning and Definition of Find definitions for: an•ti•his•ta•min•ic Pronunciation: (an"tē-his"tu-min'ik, an"tī-), [key] — Biochem., Pharm. Biochem.,Pharm. —adj. of or pertaining to an antihistamine or its effect. —n. an antihistaminic agent, as a drug. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. antihistamine antihuman Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language