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[noo-muh-tol-uh-sis, nyoo-] /ˌnu məˈtɒl ə sɪs, ˌnyu-/

noun, Geology.
the process by which rocks are altered or minerals and ores are formed by the action of vapors given off by magma.
a type of metamorphism in which hot gases from solidifying magma react with surrounding rock


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  • Pneumatophore

    [noo-mat-uh-fawr, -fohr, nyoo-, noo-muh-tuh-, nyoo-] /nʊˈmæt əˌfɔr, -ˌfoʊr, nyʊ-, ˈnu mə tə-, ˈnyu-/ noun 1. Botany. a specialized structure developed from the root in certain plants growing in swamps and marshes, serving as a respiratory organ. 2. Zoology. the air sac of a siphonophore, serving as a float. /njuːˈmætəʊˌfɔː/ noun 1. a specialized root of […]

  • Pneumatorrhachis

    pneumatorrhachis pneu·ma·tor·rha·chis (nōō’mə-tôr’ə-kĭs, nyōō’-) n. See pneumorrhachis.

  • Pneumatosis

    pneumatosis pneu·ma·to·sis (nōō’mə-tō’sĭs, nyōō’-) n. Abnormal accumulation of gas in any tissue or other part of the body.

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