'Caudal fin' definitions:

Definition of 'caudal fin'

(from WordNet)
noun
The tail of fishes and some other aquatic vertebrates [syn: tail fin, caudal fin]

Definition of 'Caudal fin'

From: GCIDE
  • Caudal \Cau"dal\, a. [L. Cauda tail. Cf. Coward.] Of the nature of, or pertaining to, a tail; having a tail-like appendage. [1913 Webster]
  • The male widow-bird, remarkable for his caudal plumes. --Darwin. [1913 Webster]
  • Caudal fin (Zool.), the terminal fin (or "tail") of a fish. [1913 Webster]