/ Dictionary / Index D dark mineral: Meaning and Definition of Find definitions for: dark' min"eral Pronunciation: [key] — Geol. Geol. any rock-forming mineral that has a specific gravity greater than 2.8 and that is generally dark in color. Cf. light mineral. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dark meat dark nebula Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language