Definition of metamorphic adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌmetəˈmɔːfɪk//
; NAmE NAmE//ˌmetəˈmɔːrfɪk//
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(of rocks) formed by the action of heat or pressure Word Origin early 19th cent.: from meta- (denoting a change of condition) + Greek morphē ‘form’ + -ic.
See the Oxford Advanced American Dictionary entry: metamorphic