pollucite Meaning, Definition & Usage

  1. noun a rare mineral that is an important source of cesium

WordNet

Pol"lu*cite noun
Etymology
See Pollux, and 4th Castor.
Definitions
  1. (Min.) 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.

Webster 1913