Change of form, shape, or structure; hence, the process by which rocks under pressure, heat, chemical action, etc., are changed from their original constitution, as limestone to marble.

形式、状态或构造的变化；变质作用；岩石组织的变质(受大气压力、热力及化学作用所致，如石灰石可变为大理石)。

Metamorphosis.

蜕变；变态；变形。