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Meaning of trondhjemite

trond•hjem•ite

Pronunciation: (tron'ye-mīt"), [key]
— n. Petrol.
  1. a coarse-grained igneous rock composed of quartz, plagioclase feldspar, and a small amount of biotite.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.