pelvic fin

noun

1. (in fishes) either of a pair of fins on the lower surface of the body, corresponding to the hind limbs of a land vertebrate; ventral fin.

pelvic fin

noun

1. either of a pair of fins attached to the pelvic girdle of fishes that help to control the direction of movement during locomotion

Word History and Origins

Origin of pelvic fin¹

First recorded in 1905–10