əˌpisthəˈpa(a)rēə noun plural
Usage: capitalized
Etymology: New Latin, from opisth- + -paria (from Greek pareia cheek)
: an order of trilobites including those in which the genal angles or spines are borne by the free cheeks
• opis·tho·par·i·an ̷ ̷| ̷ ̷ ̷ ̷|pa(a)rēən noun or adjective