In a person, animal, or plant: a hollow organ or space through which something (air, fluid, food, etc.) passes. Frequently with distinguishing word…

Anatomy and Zoology. One of the membranous canals, ducts, or tubes in which the fluids of the body are contained and by means of which they are…

Anatomy. A hollow organ serving for the conveyance of a liquid in the body. Commonly in specific applications with Latin epithet, as vas breve…

Anatomy. Any of several canals, ducts, or openings in the otic region of the skull, esp. the canal of the facial nerve. Cf. aqueduct, n. 3. Obsolete.

Physiology. Name given to several small canals, chiefly in the head of mammals.

A vessel or duct in the body. rare.