1 archipterygium | Definition of archipterygium
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archipterygium

noun
ar路​chip路​te路​ryg路​i路​um

Definition of archipterygium

: a primitive form of fin having a long segmented axis (as that of Neoceratodus)

History and Etymology for archipterygium

New Latin, from archi- + Greek pterygion little wing, fin

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