metamorphic
adjective geology specialized uk/ˌmet.əˈmɔː.fɪk/ us/ˌmet̬.əˈmɔːr.fɪk/
（岩石）变质的（因高温、高压变成了一种新的形状和结构）
(of rock) changed into a new form and structure by very great heat and pressure
Slate and gneiss are metamorphic rocks. 板岩和片麻岩都是变质岩。
Compare: igneoussedimentary