/ Dictionary / Index H helleborein: Meaning and Definition of Find definitions for: hel•le•bo•re•in Pronunciation: (hel"u-bôr'ē-in, -bōr'-), [key] — n. a yellow, crystalline, water-soluble, poisonous solid, CHO, obtained from the rhizome and root of certain hellebores, and used in medicine chiefly as a heart stimulant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hellebore helleborin Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language