( n. )
An igneous rock, usually light gray in color and breaking with a rough surface. It consists chiefly of orthoclase feldspar with sometimes hornblende and mica.
( n. )
An igneous rock, usually light gray in color and breaking with a rough surface. It consists chiefly of orthoclase feldspar with sometimes hornblende and mica.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012