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pterygiophore

noun
pte·​ryg·​io·​phore | \ təˈrijēəˌfō(ə)r, teˈr-\
plural -s

Definition of pterygiophore

: one of the cartilaginous or bony elements (as basalia and radialia) by which rays of the fin of a fish are supported : actinost

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History and Etymology for pterygiophore

pteryg- + -phore

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