pterygoquadrate

adjective
pter·​y·​go·​quadrate | \¦terə(ˌ)gō+\

Definition of pterygoquadrate 

: of, relating to, or constituting the upper half of the first branchial arch that gives rise in lower vertebrates to most of the upper jaw

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History and Etymology for pterygoquadrate

pteryg- + quadrate

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