(1):

(a.) Pertaining to, or resembling, milk; milky; as, the lacteal fluid.

(2):

(a.) Pertaining to, or containing, chyle; as, the lacteal vessels.

(3):

(n.) One of the lymphatic vessels which convey chyle from the small intestine through the mesenteric glands to the thoracic duct; a chyliferous vessel.