sugar of milk

from The American Heritage® Dictionary of the English Language, 4th Edition

• n. Lactose.

from Wiktionary, Creative Commons Attribution/Share-Alike License

• n. Lactose, a disaccharide found in milk.

from the GNU version of the Collaborative International Dictionary of English

• n. The sugar characteristic of milk; a hard white crystalline slightly sweet substance obtained by evaporation of the whey of milk. It is used in pellets and powder as a vehicle for homeopathic medicines, and as an article of diet. See Lactose.
• n. See under Milk.