ペグマタイト

noun

pegmatite

A coarse-grained igneous rock, often containing large crystals; a geological term.

• ペグマタイトは、大おおきな結けっ晶しょうを含ふくむ火か成せい岩がんの一いっ種しゅです。

  Pegmatite is a type of igneous rock that contains large crystals.