pegmatite
peg·ma·tite
noun \ˈpeg-mə-ˌtīt\Definition of PEGMATITE
: a coarse variety of granite occurring in dikes or veins
— peg·ma·tit·ic \ˌpeg-mə-ˈti-tik\ adjective
See Origin of PEGMATITE
French, from Greek pēgmat-, pēgma something fastened together, from pēgnynai to fasten together — more at pact
First Known Use: circa 1828
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