Dictionary entry

Anorthoclase

Webster's Dictionary 1913

A‐nor″tho‐clase (?), n. [Gr. � priv. + orthoclase.] (Min.) A feldspar closely related to orthoclase, but triclinic. It is chiefly a silicate of sodium, potassium, and aluminium. Sp. gr., 2.57 — 2.60.