Lewis & Short

commŏnĭtĭo, ōnis, f. [commoneo], an earnest reminding or putting in mind, an admonition, Quint. 4, 2, 51; 4, 4, 9; Cod. Th. 6, 35, 10 (in Q. Cic. Petit. Cons. 14, 54 dub.).