'Abbasid' originates from Arabic, specifically the word 'العباسيون' (al-‘Abbāsīyūn), where 'العباس' (al-‘Abbās) referred to 'Abbas,' the uncle of the Prophet Muhammad.

'العباسيون' (al-‘Abbāsīyūn) transformed into the English word 'Abbasid' through transliteration.

Initially, it referred to the descendants of Abbas, but over time it evolved into its current meaning of a member of the Abbasid dynasty.