乳糖不耐症 rǔtángbùnàizhèng lactose intolerance Definitions Defs Origin Strokes Stroke Words Sentences Sents 乳糖 rǔtáng noun lactose An organic compound and the primary sugar found in the milk of mammals; used to manufacture baby food, candy, and medicine.不耐 bùnài noun to be unable to bear to be unable to bear or endure; cannot last long or hold out症 zhèng affixnoun disease (bound form) disease; illness; medical symptoms