monosaccharide
noun [ C ] chemistry specialized uk/ˌmɒn.əʊˈsæk.ər.aɪd/ us/ˌmɑː.noʊˈsæk.ə.raɪd/
单糖（一种结构简单的碳水化合物，如葡萄糖、果糖，其分子无法进一步分解）
a simple type of carbohydrate, such as glucose and fructose, formed of molecules that cannot be broken down into any simpler form
Synonym: simple sugar
Compare: polysaccharide