Dictionary
en•ar•gite
Pronunciation: (en-är'jīt, en'ur-jīt"), [key]—
n.
a mineral, copper arsenic and sulfide, Cu
3AsS
4, occurring in the form of black orthorhombic crystals having perfect cleavage: an important source of copper.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.