Adjective
caliphal (not comparable)
Of or relating to a caliph or a caliphate.
Synonyms: caliphatic, caliphian
Al-Ma'mun introduced the Mihna with the intention to centralize religious power in the caliphal institution and test the loyalty of his subjects. Source: Internet
By this time the latter state had fragmented into several governorships that, while recognizing caliphal authority from Baghdad, did mostly as they wanted, fighting with each other. Source: Internet
This claim, that John actually served in a Muslim court, has been questioned since he is never mentioned in Muslim sources, which however do refer to his father Sarjun (Sergius) as a secretary in the caliphal administration. Source: Internet
Writers like Abu Tammam and Abu Nuwas were closely connected to the caliphal court in Baghdad during the early 9th century, while others such as al-Mutanabbi received their patronage from regional courts. Source: Internet