milk sugar
Noun
Meaning
a sugar comprising one glucose molecule linked to a galactose molecule; occurs only in milk
Source: WordNetAlternative names
milk-sugar
Synonyms
Hypernyms
Examples
cow's milk contains about 4.7% lactose
I could desperately use some milk sugar here.
The most common example of malabsorption leading to increased production of gas is lactose (milk sugar) intolerance.