metamorphic rock

English

Noun

metamorphic rock (countable and uncountable, plural metamorphic rocks)

  1. (geology) one of the major groups of rock that makes up the crust of the Earth; consists of pre-existing rock mass in which new minerals or textures are formed at higher temperatures and greater pressures than those present on the Earth's surface.
    Hypernyms: rock, stone < material
    Hyponyms: marble; more at Wikipedia
    Coordinate terms: igneous rock, sedimentary rock

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