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Meaning of tennantite

ten•nant•ite

Pronunciation: (ten'un-tīt"), [key]
— n.
  1. 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.