n. A rare, gray mineral, a mixed sulfide and arsenide of cobalt and iron with the chemical formula CoAsS; it is an ore of cobalt.
The Century Dictionary and Cyclopedia
n. A sulpharsenide of cobalt. It is a mineral of a silver-white color, with a tinge of red, occurring in isometric crystals, often cubes or pyritohedrons. Also called cobalt-glance.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a rare silvery-white mineral; important ore of cobalt
Word Usage
"Closeups of cobaltite, top, a rare ore of cobalt, and molybdenite, bottom, the main ore of molybdenum."