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Definition of Lactose
1. Noun. A sugar comprising one glucose molecule linked to a galactose molecule; occurs only in milk. "Cow's milk contains about 4.7% lactose"
Definition of Lactose
1. n. Sugar of milk or milk sugar; a crystalline sugar present in milk, and separable from the whey by evaporation and crystallization. It has a slightly sweet taste, is dextrorotary, and is much less soluble in water than either cane sugar or glucose. Formerly called lactin.
Definition of Lactose
1. a lactic sugar [n -S]
Medical Definition of Lactose
1. The major sugar in human and bovine milk. Conversion of lactose to lactic acid by Lactobacilli etc. Is important in the production of yoghurt and cheese. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)