aphanite: Meaning and Definition of

aph•a•nite

Pronunciation: (af'u-nīt"), [key]
— n. Petrog.
  1. a fine-grained igneous rock having such compact texture that the constituent minerals cannot be detected with the naked eye.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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