/ Dictionary / Index R rhodochrosite: Meaning and Definition of Find definitions for: rho•do•chro•site Pronunciation: (rō"du-krō'sīt), [key] — n. a mineral, manganese carbonate, MnCO, commonly containing some iron and calcium, and usually rose-red in color: a minor ore of manganese; manganese spar. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rhodochrosite (Thesaurus) rhodo- rhododendron Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language