n. A colorless transparent mineral of the zeolite family consisting of hydrous cesium aluminum silicate and occurring massive or crystallizing in cubes.
the GNU version of the Collaborative International Dictionary of English
n. A colorless transparent mineral, resembling quartz, occurring with castor or castorite on the island of Elba. It is a silicate of alumina and cæsia. Called also pollux.
The Century Dictionary and Cyclopedia
n. Same as pollux, 3.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a rare mineral that is an important source of cesium
Word Usage
"Most cesium is retrieved from the mineral pollucite."