- noun a gland that discharges its secretion through a duct into a body cavity or to the exterior, e.g. the sweat glands and salivary glands
- noun a gland with ducts which channel secretions to particular parts of the body such as the liver, the sweat glands, the pancreas and the salivary glands.
- noun a gland that releases a secretion through a duct to the surface of an organ, e.g. the sweat and salivary glands