/ Dictionary / Index A atacamite: Meaning and Definition of Find definitions for: at•a•cam•ite Pronunciation: (at"u-kam'īt, u-tak'u-mīt"), [key] — n. a mineral, hydrated chloride of copper, CuCl(OH), occurring in a green, granular form: a minor ore of copper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Atacama Desert atactic Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language