Abbasid
noun
Ab·bas·id ə-ˈba-səd 
ˈa-bə-səd
ˈa-bə-səd : a member of a dynasty of caliphs (750–1258) ruling the Islamic empire especially from their capital Baghdad and claiming descent from Abbas the uncle of Muhammad
Word History
Etymology
ʽAbbās ibn ʽAbdias al-Muṭṭāālib died circa 653 uncle of Muhammad + -id entry 1
First Known Use
1719, in the meaning defined above