trachyte Hear it!

trachyte definition

tra·chyte (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

Etymology: Fr < Gr trachys, rough: see trachea

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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