灰白質 かいはくしつ Meanings Noun gray matter; grey matter Kanji 灰 ash. Read as カイ. 白 white. Read as ハク. 質 quality. Read as シツ. Words containing 灰白質 脊髄灰白質炎 (せきずいかいはくしつえん) poliomyelitis Word lists Anatomy Jinuma: Japanese Dictionary · Word lists