Batholith

n. mass of igneous rock pressed between sedimentary rocks (Geology)

A batholith (from Greek bathos, depth + lithos, rock) is a large emplacement of igneous intrusive (also called plutonic) rock that forms from cooled magma deep in the Earth's crust. Batholiths are almost always made mostly of felsic or intermediate rock-types, such as granite, quartz monzonite, or diorite (see also granite dome).
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Noun
1. large mass of intrusive igneous rock believed to have solidified deep within the earth
(synonym) batholite, pluton, plutonic rock
(hypernym) igneous rock
(hyponym) granite

n. batholith, mass of igneous rock pressed between sedimentary rocks (Geology)

A massive discordant pluton with a surface area greater than 100 square kilometers, typically having a depth of about 30 kilometers. Batholiths are generally found in elongated mountain - ranges after the country rock above them has eroded.