变态,变形,变质
Metamorphism \Met`a*mor"phism\, n. (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.
metamorphism n : change in the structure of rock by natural agencies such as pressure or heat of introduction of new chemical substances