/ Dictionary / Index H heme: Meaning and Definition of Find definitions for: heme Pronunciation: (hēm), [key] — n. Biochem. a deep-red iron-containing blood pigment, CHNOFe, obtained from hemoglobin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heme (Thesaurus) hematuria Hemel Hempstead Related Content Daily Word Quiz: hinder Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language