Definitions for "Lactase deficiency"
Lack of adequate supply of the enzyme lactase. Will cause difficulty in digesting milk and milk products.
congenital disorder consisting of an inability to digest milk and milk products; absence or deficiency of lactase results in an inability to hydrolyze lactose
An inherited disorder in which a person does not have the enzyme lactase, which leads to lactose intolerance, which means the inability to digest lactose