/ Dictionary / Index C cyproheptadine: Meaning and Definition of Find definitions for: cy•pro•hep•ta•dine Pronunciation: (sī"prō-hep'tu-dēn"), [key] — n. Pharm. a phenothiazine analogue, CHN, with antihistaminic action, used in the symptomatic treatment of hay fever and itching. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cyproheptadine (Thesaurus) Cypro- cyprus Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language