I. She who moderates or allays; a directress, mistress, governess (mostly Ciceron.): “sibi,” Plaut. Cist. 2, 2, 3.—
II. That which rules, guides, controls, etc.: “temperantia est moderatrix omnium commotionum,” Cic. Tusc. 5, 14, 42: “materiae,” id. N. D. 3, 39, 92: “factorum,” id. Phil. 5, 18, 50: “officii,” id. Fl. 24, 57.