/ Dictionary / Index M manganous sulfate: Meaning and Definition of Find definitions for: man'ganous sul'fate Pronunciation: [key] a pink, water-soluble, usually tetrahydrate salt, MnSO&multiplydot;4HO, used chiefly in fertilizers, paints, and varnishes. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. manganous Mangbetu Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language