'Pegmatite' definitions:
Definition of 'pegmatite'
noun
A form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements
Definition of 'Pegmatite'
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Pegmatite \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.
[1913 Webster]
Words containing 'Pegmatite'
