Etymology
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metamorphic (adj.)

1833 (Lyell) in the geological sense, "exhibiting change in form or structure," in reference to rock whose form has been changed by heat or pressure, from Greek meta "trans-" (see meta-) + morphē "form," a word of uncertain origin. Earlier (1816) in a theological sense, "characterized by change of form," from metamorphosis + -ic.

updated on January 05, 2019

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Definitions of metamorphic from WordNet

metamorphic (adj.)
of or relating to metamorphosis (especially of rocks);
metamorphic stage
marble is a metamorphic rock that takes a high polish
Synonyms: metamorphous
metamorphic (adj.)
characterized by metamorphosis or change in physical form or substance;
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.