CAUDAL
caudal
(adjective) situated in or directed toward the part of the body from which the tail arises; “caudal fins”; “the caudal end of the body”
caudal, taillike
(adjective) resembling a tail
caudal
(adjective) constituting or relating to a tail; “caudal appendage”
caudally, caudal
(adverb) toward the posterior end of the body
Source: WordNet® 3.1
Etymology
Adjective
caudal (not comparable)
(zoology) Pertaining to the tail or posterior or hind part of a body.
Noun
caudal (plural caudals)
A caudal vertebra.
Source: Wiktionary
Cau"dal, a. Etym: [L. Cauda tail. Cf. Coward.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition