lactase

n. enzyme found in the intestinal juices of mammals and in certain yeasts and is able to hydrolize lactose into glucose and galactose (Chemistry)

Lactase (LCT), a member of the β-galactosidase family of enzymes, is a glycoside hydrolase involved in the hydrolysis of the disaccharide lactose into constituent galactose and glucose monomers. In humans, lactase is present predominantly along the brush border membrane of the differentiated enterocytes lining the villi of the small intestine.
See more at Wikipedia.org...

Lactase /lac·tase/ a ß-galactosidase occurring in the brush border membrane of the intestinal mucosa that catalyzes the cleavage of lactose to [more]Lactase - Community and Resources

Noun
1. any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose
(synonym) Lactaid
(hypernym) disaccharidase
(classification) trade name, brand name, brand, marque

n. lactase, enzyme found in the intestinal juices of mammals and in certain yeasts and is able to hydrolize lactose into glucose and galactose (Chemistry)