noun: (genetics) A gene responsible for encoding lactase; mutations in this gene are responsible for adults' ability to digest lactose.
noun: (biochemistry) Abbreviation of lactase. [(biochemistry, organic chemistry) A β-galactosidase enzyme that is involved in the hydrolysis of the disaccharide lactose into constituent galactose and glucose monomers.]
noun: (nautical, military) Initialism of landing craft tank. [(military, nautical) an amphibious assault water vessel designed to transport a tank across water to directly onto shore, where the tank may roll off the vessel onto the shore, while under enemy fire.]
