Opisthoparia

plural noun

Opis·​tho·​par·​ia

əˌpisthəˈpa(a)rēə

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

opisthoparian

⸗¦⸗⸗¦pa(a)rēən

noun or adjective

Word History

Etymology

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

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