noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally with muscovite and/or biotite mica. countable, uncountable
2. 2
   a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements wordnet

Etymology

From Ancient Greek πήγνυμι (pḗgnumi, “to attach, join”) + -ite

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.