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andesite: Meaning and Definition of

an•des•ite

Pronunciation: (an'du-zīt"), [key]
— n.
  1. a dark-colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, as hornblende or biotite.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
andesine Andes lightning
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