乳糖 にゅうとう Meanings Noun lactose; milk sugar Kanji 乳 milk. Read as ニュウ. 糖 sugar. Read as トウ. Words containing 乳糖 乳糖不耐症 (にゅうとうふたいしょう) lactose intolerance 無乳糖 (むにゅうとう) lactose-free Word lists Chemistry Jinuma: Japanese Dictionary · Word lists