/ Dictionary / Index C colemanite: Meaning and Definition of Find definitions for: cole•man•ite Pronunciation: (kōl'mu-nīt"), [key] — n. a mineral, hydrous calcium borate, CaBO&multiplydot;5HO, occurring in colorless or milky-white crystals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Coleman colent. Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language