珪長質 けいちょうしつ Meanings の-adjective, Noun felsic See also: 苦鉄質 (くてつしつ). Kanji 珪 jade scepter or tablet (authority symbol). Read as ケイ. 長 long. Read as チョウ. 質 quality. Read as シツ. Jinuma: Japanese Dictionary · Word lists