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amphistylic

adjective
am·​phi·​sty·​lic | \ -lik\

Definition of amphistylic

: having the upper jaw partly free from the brain case and braced by the hyomandibular cartilage (as in certain primitive sharks) — compare autostylic, hyostylic

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First Known Use of amphistylic

1876, in the meaning defined above

History and Etymology for amphistylic

amphi- + -stylic

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The first known use of amphistylic was in 1876

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