"Anorthite" is a word in ENGLISH

A transparent or translucent variety of common feldspar, or orthoclase, which often shows pearly opalescent reflections; -- called by lapidaries …

A mineral of the feldspar family, triclinic in crystallization, and in composition a silicate of alumina and soda. It is …

A variety of feldspar, having a verdigris-green color.

A kind of triclinic feldspar found in the Andes.

An eruptive rock allied to trachyte, consisting essentially of a triclinic feldspar, with pyroxene, hornblende, or hypersthene.

A very compact, dark-colored /ock, consisting of hornblende, or pyroxene, and feldspar, but neither of them in perceptible grains.

A rock of igneous origin, consisting of augite and triclinic feldspar, with grains of magnetic or titanic iron, and also …

A variety of feldspar found in crystals in the county of Chester, Pennsylvania.

A basic, dark-colored, holocrystalline, igneous rock, consisting essentially of a triclinic feldspar and pyroxene with magnetic iron; -- often limited …

An igneous, crystalline in structure, consisting essentially of a triclinic feldspar and hornblende. It includes part of what was called …

A dark-colored, basic, igneous rock, composed essentially of pyroxene and a triclinic feldspar with magnetic iron. By many authors it …

One of the ultimate parts which are variously combined in anything; as, letters are the elements of written language; hence, …

Alt. of Feldspath

Pertaining to, or consisting of, feldspar.

A finegrained rock, flintlike in fracture, consisting essentially of orthoclase feldspar with occasional grains of quartz.

See Feldspar.

A crystalline rock, consisting, like granite, of quartz, feldspar, and mica, but having these materials, especially the mica, arranged in …

A crystalline, granular rock, consisting of quartz, feldspar, and mica, and usually of a whitish, grayish, or flesh-red color. It …

A whitish, granular rock, consisting of feldspar and quartz intimately mixed; -- sometimes called whitestone, and leptynite.

A grayish or greenish compact rock, composed of feldspar and augite, and allied to basalt.