What is of the nature of, or pertaining to, a tail; having a tail-like appendage. The male widow-bird, remarkable for his caudal plumes. Darwin. Caudal fin (Zoöl.), the terminal fin (or "tail") of a fish called?

caudal — Of the nature of, or pertaining to, a tail; having a tail-like appendage. The male widow-bird, remarkable for his caudal plumes. Darwin. Caudal fin (Zoöl.), the terminal fin (or "tail") of a fish. (Webster's 1913.)

Sources