A person who is expert in or who composes decrees; someone versed in decretal law.
From Latin decretum (decree) + -orian (one related to). This term parallels structure with words like 'Ciceronian,' describing someone skilled in or following a particular domain of knowledge.
This is essentially another word for a decretist—a medieval legal scholar—but decretorian sounds even more specialized and authoritative, like someone who could write decrees from memory.
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