assessorial,a.|æsɛˈsɔərɪəl| Also 8 assyss-. [f. L. assessōri-us, f.assessor: see prec. and -al1.] Of or pertaining to an assessor or assessors. 1726De Foe Hist. Devil (1822) 17 The assyssorial tribunal of Poland.1849Lewes Robespierre 116 Begging your assessorial and provostal majesty's pardon.