/ Dictionary / Index T tennantite: Meaning and Definition of Find definitions for: ten•nant•ite Pronunciation: (ten'un-tīt"), [key] — n. a mineral, copper arsenic sulfide, approximately CuAsS: a copper ore and an end member of a series of solid solutions into which antimony enters to form tetrahedrite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Tennant tenner Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language