乳脂 にゅうし Meanings Noun butterfat; milk fat See also: 乳脂肪 (にゅうしぼう). Kanji 乳 milk. Read as ニュウ. 脂 fat. Read as シ. Words containing 乳脂 乳脂肪 (にゅうしぼう) butterfat 乳脂計 (にゅうしけい) galactometer Jinuma: Japanese Dictionary · Word lists