Stuck on a problem? Get great tutoring at an affordable price with Chegg
to join and get your 1st 30 minutes Free!
From Biology-Online Dictionary
(Science: chemical) graphic granite. See Granite.
More generally, a coarse granite occurring as vein material in other rocks.
Origin: From Gr. Something fastened together, in allusion to the quartz and feldspar in graphic granite: cf. F. Pegmatite. See Pegm.