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Meaning of antihistaminic

an•ti•his•ta•min•ic

Pronunciation: (an"tē-his"tu-min'ik, an"tī-), [key]
— Biochem., Pharm. Biochem.,Pharm.
—adj.
  1. of or pertaining to an antihistamine or its effect.
—n.
  1. an antihistaminic agent, as a drug.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.