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Definition of “pectoral fin” - English Dictionary

"pectoral fin" in British English

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pectoral finnoun [C]

uk   /ˈpek.tər.əl ˌfɪn/  us   /ˈpek.tɔːr.əl ˌfɪn/ specialized
the fin on each ​side of a ​fish near the ​front of ​itsbody, used for ​controlling the ​direction the ​fish goes in and for ​slowing it down
(Definition of pectoral fin from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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