
1) Canon-law expert 2) Expert in the canon law 3) Medieval law
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https://www.crosswordclues.com/clue/decretist

In the history of canon law, a decretist was student and interpreter of the Decretum Gratiani. Like Gratian, the decretists sought to provide `a harmony of discordant canons` (concordia discordantium canonum), and they worked towards this through glosses (glossae) and summaries (summae) on Gratian. They are contrasted with the decretalists, whos.....
Found on
http://en.wikipedia.org/wiki/Decretist

• (n.) One who studies, or professes the knowledge of, the decretals.
Found on
http://thinkexist.com/dictionary/meaning/decretist/
De·cre'tist noun [ Late Latin
decretista , from
decretum : confer French
décrétiste . See
Decree ,
noun ] One who studies, or professes the knowledge of, the decretals.
Found on
http://www.encyclo.co.uk/webster/D/19

a student in the faculty of law. · a student of the Decretals; expert in the canon law.
Found on
https://www.infoplease.com/dictionary/decretist
No exact match found.