commissional
/kəˈmɪʃ(ə)n(ə)l/ /kəˈmɪʃən(ə)l/adjective
Of or relating to a commission; conferring or conferred by a commission.
- letter commissional noun Obsolete. = letter of commission..
Origin
Early 16th century. From post-classical Latin commissionalis of or relating to a commission from classical Latin commissiōn-, commissiō + -ālis.