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Meaning of prehnite

prehn•ite

Pronunciation: (prā'nīt, pren'īt), [key]
— n.
  1. a mineral, hydrous calcium aluminum silicate, CaAlSiO(OH), occurring in light-green reniform aggregates or tabular crystals.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.