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Definition of Lactase
1. Noun. Any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose.
Definition of Lactase
1. Noun. (enzyme) A ?-galactosidase enzyme that is involved in the hydrolysis of the disaccharide lactose into constituent galactose and glucose monomers. ¹
¹ Source: wiktionary.com
Definition of Lactase
1. an enzyme [n -S] - See also: enzyme
Medical Definition of Lactase
1. Enzyme that breaks down the milk sugar lactose. (12 Dec 1998)