caudal /ˈkɔːdəl/adjective 2noun 1forms 1 adjective2 •Pertaining to the tail or posterior or hind part of a body.The male widow-bird, remarkable for his caudal plumes, […] — 1871 •Toward the tail end (hind end) of the body; in bipeds such as humans, this direction corresponds to inferior. noun1 •A caudal vertebra. formscaudals