Definitions for lactaseˈlæk teɪs, -ˌteɪz
Random House Webster's College Dictionary
lac•taseˈlæk teɪs, -ˌteɪz(n.)
an enzyme capable of breaking down lactose into glucose and galactose.
Origin of lactase:
any of a group of enzymes (trade name Lactaid) that hydrolyze lactose to glucose and galactose
A u03B2-galactosidase enzyme that is involved in the hydrolysis of the disaccharide lactose into constituent galactose and glucose monomers.
U.S. National Library of Medicine
An enzyme which catalyzes the hydrolysis of LACTOSE to D-GALACTOSE and D-GLUCOSE. Defects in the enzyme cause LACTOSE INTOLERANCE.