'Metamorphic' definitions:

Definition of 'metamorphic'

From: WordNet
adjective
Of or relating to metamorphosis (especially of rocks); "metamorphic stage"; "marble is a metamorphic rock that takes a high polish" [syn: metamorphic, metamorphous]
adjective
Characterized by metamorphosis or change in physical form or substance [ant: nonmetamorphic]

Definition of 'Metamorphic'

From: GCIDE
  • Metamorphic \Met`a*mor"phic\, a. [See Metamorphosis.]
  • 1. Subject to change; changeable; variable. [1913 Webster]
  • 2. Causing a change of structure. [1913 Webster]
  • 3. (Geol.) Pertaining to, produced by, or exhibiting, certain changes which minerals or rocks may have undergone since their original deposition; -- especially applied to the recrystallization which sedimentary rocks have undergone through the influence of heat and pressure, after which they are called metamorphic rocks. [1913 Webster]