gadolinite Meaning, Definition & Usage

  1. noun a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium
    ytterbite.

WordNet

Gad"o*lin*ite noun
Etymology
Named after Gadolin, a Russian chemist.
Definitions
  1. (Min.) A mineral of a nearly black color and vitreous luster, and consisting principally of the silicates of yttrium, cerium, and iron.

Webster 1913