/ Dictionary / Index H hydrastinine: Meaning and Definition of Find definitions for: hy•dras•ti•nine Pronunciation: (hī-dras'tu-nēn", -nin), [key] — n. Pharm. a white, crystalline, poisonous alkaloid, CHNO, synthesized from hydrastine: used to arrest bleeding, esp. in the uterus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrastine hydrastis Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language