pectoral fin

pectoral fin

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

pectoral fin

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

pec′toral fin′

n. (in fishes) either of a pair of fins usu. situated behind the head, one on each side, and corresponding to the forelimbs of higher vertebrates. [1760–70]

Thesaurus

Noun

1.

pectoral fin - either of a pair of fins situated just behind the head in fishes that help control the direction of movementfin - organ of locomotion and balance in fishes and some other aquatic animals

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