n. A mineral composed of calcium tungstate, with the chemical formula CaWO4; an important tungsten ore.
the GNU version of the Collaborative International Dictionary of English
n. Calcium tungstate, a mineral of a white or pale yellowish color and of the tetragonal system of crystallization.
The Century Dictionary and Cyclopedia
n. Native calcium tungstate, a mineral of high specific gravity, occurring in tetragonal crystals which often show hemihedral modifications, also massive, of a white, yellowish, or brownish color, and vitreous to adamantine luster.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a mineral used as an ore of tungsten
Word Usage
"Hundreds of fossils are locked in glass cases, specimens from all over southern Africa: shells and worms and nautiluses and seed ferns and trilobites, and minerals, too; yellow-green crystals and gleaming clusters of quartz; mosquitoes in drops of amber; scheelite, wulfenite."