1. (noun) congenital disorder consisting of an inability to digest milk and milk products; absence or deficiency of lactase results in an inability to hydrolyze lactose

• lactase deficiency
• milk intolerance

1. (noun) congenital disorder consisting of an inability to digest milk and milk products; absence or deficiency of lactase results in an inability to hydrolyze lactose

• congenital disease
• genetic abnormality
• genetic defect
• genetic disease
• genetic disorder
• hereditary condition
• hereditary disease
• inherited disease
• inherited disorder