'Felspar' definitions:

Definition of 'felspar'

From: WordNet
noun
Any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium [syn: feldspar, felspar]

Definition of 'Felspar'

From: GCIDE
  • Felspar \Fel"spar`\, Felspath \Fel"spath`\, n. (Min.) See Feldspar. [1913 Webster]