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 noun or adjective
⸗¦⸗⸗¦pa(a)rēən
Word History
Etymology
New Latin, from opisth- + -paria (from Greek pareia cheek)