noun mesop·te·ryg·i·um \¦me|ˌzäptəˈrijēəm, ¦mē|, |ˌsä-\

Definition of mesopterygium

  1. :  the middle one of the three principal basal cartilages in the pectoral fins of various fishes (as the sharks and rays) — compare basipterygium

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Origin and Etymology of mesopterygium

New Latin, from mes- + Greek pterygion fin, literally, small wing — more at pterygium

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a trip made at another's expense

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