Lewis & Short

mŏdĕrātor, ōris, m. [moderor], a manager, ruler, governor, director.

  1. I. Lit. (class.): rector et moderator tanti operis, Cic. N. D. 2, 35, 90: dierum, id. Tusc. 1, 28, 70: equorum, Ov. M. 4, 245: arundinis, an angler, id. ib. 8, 856: pectinis unci, a wool-comber, Claud. ap. Eutr. 2, 381: juventae, a tutor, Mart. 2, 90, 1: vitae, Nazar. Pan. ad Const. 15.
  2. II. He who moderates: nec moderator adest, i. e. who could moderate, put a limit to the evil, Ov. M. 7, 561; Tac. A. 1, 49.