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pectoral fin

   Also found in: Encyclopedia 0.07 sec.
pectoral fin
n.
Either of the anterior pair of fins attached to the pectoral girdle of fishes, corresponding to the forelimbs of higher vertebrates.
pectoral fin
Noun
a fin, just behind the head in fishes, that helps to control the direction of movement
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.pectoral finpectoral fin - either of a pair of fins situated just behind the head in fishes that help control the direction of movement
fin - organ of locomotion and balance in fishes and some other aquatic animals


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