sodalite Meaning, Definition & Usage

  1. noun a vitreous mineral consisting of sodium aluminum silicate and sodium chloride in crystalline form; occurs in igneous rocks

WordNet

So"da*lite noun
Etymology
Soda + -lite: cf. F. sodalithe.
Definitions
  1. (Min.) A mineral of a white to blue or gray color, occuring commonly in dodecahedrons, also massive. It is a silicate of alumina and soda with some chlorine.

Webster 1913