milk sugar is a noun meaning "a sugar comprising one glucose molecule linked to a galactose molecule; occurs only in milk". It carries one recorded sense.
a sugar comprising one glucose molecule linked to a galactose molecule; occurs only in milk
“cow's milk contains about 4.7% lactose”
Definitions, synonyms and semantic relations for milk sugar come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.