metamorphismn. 變態、變形、變質學術名詞變質作用：地質學、地理學、礦冶工程、礦物學、海洋地質學動力變質作用：礦物學區域變質作用：礦物學熱變質作用：礦物學英文釋義change in the structure of rock by natural agencies such as pressure or heat or introduction of new chemical substances