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Meaning of epidiorite

ep•i•di•o•rite

Pronunciation: (ep"i-dī'u-rīt"), [key]
— n. Petrog.
  1. a schistose metamorphic rock resulting from the alteration of augite to hornblende in a gabbro or dolerite.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.