pectoral fin

Definition of Pectoral Fin in English :

1. pectoral fin

either of a pair of fins situated just behind the head in fishes that help control the direction of movement

WordNet Lexical Database for English. Princeton University. 2010.

Pectoral Fin

noun

either of a pair of fins, situated just behind the head in fishes, that help to control the direction of movement during locomotion

either of a pair of fins, associated with the pectoral girdle, just behind the head of a fish, corresponding to the forelimbs of a higher vertebrate

n.

Either of the anterior pair of fins attached to the pectoral girdle of fishes, corresponding to the forelimbs of other vertebrates.