/ Dictionary / Index L lactalbumin: Meaning and Definition of Find definitions for: lac•tal•bu•min Pronunciation: (lak"tul-by'min), [key] — n. Biochem. the simple protein of milk, obtained from whey, used in the preparation of certain foods and in adhesives and varnishes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lactalbumin (Thesaurus) lact- lactam Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language