'Glassy feldspar' definitions:

Definition of 'Glassy feldspar'

From: GCIDE
  • Glassy \Glass"y\, a.
  • 1. Made of glass; vitreous; as, a glassy substance. --Bacon. [1913 Webster]
  • 2. Resembling glass in its properties, as in smoothness, brittleness, or transparency; as, a glassy stream; a glassy surface; the glassy deep. [1913 Webster]
  • 3. Dull; wanting life or fire; lackluster; -- said of the eyes. "In his glassy eye." --Byron. [1913 Webster]
  • Glassy feldspar (Min.), a variety of orthoclase; sanidine. [1913 Webster]

Definition of 'glassy feldspar'

From: GCIDE
  • Sanidine \San"i*dine\, n. [Gr. ?. ?, a board. So called in allusion to the tabular crystals.] (Min.) A variety of orthoclase feldspar common in certain eruptive rocks, as trachyte; -- called also glassy feldspar. [1913 Webster]