metasomatism

noun

meta·​so·​ma·​tism ˌme-tə-ˈsō-mə-ˌti-zəm How to pronounce metasomatism (audio)
: metamorphism that involves changes in the chemical composition as well as in the texture of rock
metasomatic adjective

Word History

Etymology

metasomatic from German metasomatisch, from Greek meta- + sōmat-, sōma body

First Known Use

1886, in the meaning defined above

Time Traveler
The first known use of metasomatism was in 1886

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Cite this Entry

“Metasomatism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/metasomatism. Accessed 2 Jul. 2026.

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