a fine-grained, light-colored, extrusive igneous rock, consisting chiefly of alkali feldspars: it is the extrusive equivalent to syenite
Origin of trachyteFrench ; from Classical Greek trachys, rough: see trachea
A light-colored igneous rock consisting essentially of alkali feldspar.
Origin of trachyteFrench, from Greek trākhus, rough.
From French trachyte, from Ancient Greek τρᾱχύς (trākhus, “rough”).