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pegmatite

Noun

peg=ma=tite

WORDNET DICTIONARY

pegmatite(n = noun.substance) Array - a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements; Array

pegmatite, n. [From Gr. something fastened together, in allusion to the quartz and feldspar in graphic granite: cf. F. pegmatite. See Pegm.].

Graphic granite. See under Granite. [1913 Webster]

pegmatite, n. a coarsely crystalline type of granite.

Etymology

Gk pegma -atos thing joined together f. pegnumi fasten

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