| 单词 | Opisthoparia | 
| 释义 | Opisthopariaplural 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 | 
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