Meaning of ultrametamorphism

ul•tra•met•a•mor•phism

Pronunciation: (ul"tru-met"u-môr'fiz-um), [key]
— n. Geol.
  1. metamorphism during which the temperature of a rock exceeds its melting point.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.