/ Dictionary / Index H hemosiderin: Meaning and Definition of Find definitions for: he•mo•sid•er•in Pronunciation: (hē"mō-sid'ur-in, hem"ō-), [key] — n. Biochem. a yellowish-brown protein containing iron, derived chiefly from hemoglobin and found in body tissue and phagocytes, esp. as the result of disorders in iron metabolism and the breakdown of red blood cells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hemosiderin (Thesaurus) hemorrhoidectomy hemostasis Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language