trachyte

(trā′kīt′, trak′īt′)

noun

a fine-grained, light-colored, extrusive igneous rock, consisting chiefly of alkali feldspars: it is the extrusive equivalent to syenite

Origin: Fr < Gr trachys, rough: see trachea

See trachyte in American Heritage Dictionary 4

noun

A light-colored igneous rock consisting essentially of alkali feldspar.

Origin:

Origin: French

Origin: , from Greek trākhus, rough

Related Forms:

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