commentārĭŏlum

I. a short treatise, brief commentary: hoc, Q. Cic. Pet. Cons. 14 fin.; of dub. form, Cic. Fin. 4, 4, 10; id. de Or. 1, 2, 5; id. Phil. 1, 7, 16; Quint. 1, 5, 7.