diorite Hear it!

diorite definition

dio·rite (dī′ə rīt′)

noun

a dark-gray, intrusive igneous rock consisting chiefly of plagioclase and hornblende

Etymology: Fr < Gr diorizein, to divide < dia-, through + horizein, to separate: see horizon

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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