Search the dictionary A Chinese word or character, or English Draw a character Search 4 entries. rǔsuān 乳酸 lactic acid rǔsuānjūn 乳酸菌 lactic acid bacteria rǔsuāngǎnjūn 乳酸杆菌 lactobacillus rǔsuāngǎnjūn 乳酸桿菌 lactobacillus