circa 1828, in the meaning defined above
French, from Greek pēgmat-, pēgma something fastened together, from pēgnynai to fasten together — more at pact
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Cite this Entry
“Pegmatite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pegmatite. Accessed 5 Mar. 2021.
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