黒くろ雲うん母もくろうんもMeanings1nounbiotite; black micamineralogyA common rock-forming mineral of the mica group, typically dark brown to black; also called black mica or green mica in older texts.花か崗こう岩がんには黒くろ雲うん母もがよく含ふくまれている。Granite often contains biotite.
