caudal fin

caudal fin

n

(Life Sciences & Allied Applications / Zoology) the tail fin of fishes and some other aquatic vertebrates, used for propulsion during locomotion

Thesaurus

Noun

1.

caudal fin - the tail of fishes and some other aquatic vertebrates tail fin fin - organ of locomotion and balance in fishes and some other aquatic animals heterocercal fin - a tail fin with unequal lobes in which the vertebral column turns upward into the larger lobe as in sharks homocercal fin - symmetrical tail fin extending beyond the end of the vertebral column as in most bony fishes fish - any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills; "the shark is a large fish"; "in the living room there was a tank of colorful fish"