Peg"ma*tite (?), n. [From Gr. something fastened together, in allusion to the quartz and feldspar in graphic granite: cf. F. pegmatite. See Pegm.] Min. (a)

Graphic granite. See under Granite.

(b)

More generally, a coarse granite occurring as vein material in other rocks.

 

© Webster 1913.

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