ōrātĭuncŭla, ae, f. dim. [oratio],
a little speech , a brief oration (class.), Cic. Brut. 19, 77; id. Att. 13, 19, 2; 15, 3, 2; Quint. 4, 3, 17: aureola, Cic. N. D. 3, 17, 43.
ōrātiuncula ae, f dim.oratio, a little speech, few remarks : illa aureola. ...
An Elementary Latin Dictionary