Webster's Revised Unabridged Dictionary · 1913

Caudal

Caudal , adjective

[Latin Cauda tail. Compare Coward.]

Of the nature of, or pertaining to, a tail; having a tail-like appendage.
The male widow-bird, remarkable for his caudal plumes. — Darwin
Collocations (1)
Caudal fin (Zoology) , the terminal fin (or “tail”) of a fish.