/ Dictionary / Index B black copper: Meaning and Definition of Find definitions for: black' cop'per Pronunciation: [key] — Metall. Metall. a regulus of 95-percent-pure copper, produced in a blast furnace by smelting oxidized copper ores. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. black comedy black cosmos Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language