/ Dictionary / Index O orichalcum: Meaning and Definition of Find definitions for: or•i•chal•cum Pronunciation: (ôr"i-kal'kum), [key] — n. a brass rich in zinc, prepared by the ancients. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oribi oriel Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language