乳酸 にゅうさん Meanings Noun lactic acid Kanji 乳 milk. Read as ニュウ. 酸 acid. Read as サン. Words containing 乳酸 乳酸菌 (にゅうさんきん) lactic-acid bacilli 乳酸発酵 (にゅうさんはっこう) lactic fermentation 乳酸飲料 (にゅうさんいんりょう) lactic-acid drink And 7 more. Word lists Chemistry Jinuma: Japanese Dictionary · Word lists