/ Dictionary / Index A albumin: Meaning and Definition of Find definitions for: al•bu•min Pronunciation: (al-by'mun), [key] — n. Biochem. any of a class of simple, sulfur-containing, water-soluble proteins that coagulate when heated, occurring in egg white, milk, blood, and other animal and vegetable tissues and secretions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: albumin (Thesaurus) albumen plate albuminate Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language