exercĭtātor — Lewis & Short
exercĭtātor, ōris, m.id.,
I an exerciser, trainer (post-Aug.), Plin. 23, 7, 63, § 121:
agilitatis,id. 35, 11, 40, § 136:
EQVITVM,Inscr. Orell. 3498 sq.; cf. ib. 3413.