plural noun Opis·tho·par·ia \əˌpisthəˈpa(a)rēə\

Definition of Opisthoparia

  1. :  an order of trilobites including those in which the genal angles or spines are borne by the free cheeks


noun or adjective

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Origin and Etymology of opisthoparia

New Latin, from opisth- + -paria (from Greek pareia cheek)

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