Dictionary
met•a•mor•phism
Pronunciation: (met"u-môr'fiz-um), [key]—
n.
1. Geol.a change in the structure or constitution of a rock due to natural agencies, as pressure and heat, esp. when the rock becomes harder and more completely crystalline.
2. Archaic.metamorphosis.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.