lactase

An enzyme occurring in certain yeasts and in the intestinal juices of mammals and catalyzing the hydrolysis of lactose into glucose and galactose.

A ferment which inverts lactose to dextrose and galactose.

A β-galactosidase enzyme that is involved in the hydrolysis of the disaccharide lactose into constituent galactose and glucose monomers.

Any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose.