metamorphism Meaning, Definition & Usage
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noun change in the structure of rock by natural agencies such as pressure or heat or introduction of new chemical substances
WordNet
Met`a*mor"phism noun
Definitions
(Geol.) The state or quality of being metamorphic; the process by which the material of rock masses has been more or less recrystallized by heat, pressure, etc., as in the change of sedimentary limestone to marble. Murchison.
