trītor — Lewis & Short
trītor, ōris, m.tero,
I a rubber, grinder, chafer:
colorum,a grinder of colors, Plin. 35, 11, 40, § 145: compedium, a chain-rubber, a term of reproach applied to a chained slave, Plaut. Pers. 3, 3, 15:
stimulorum, of one who is often scourged,id. ib. 5, 2, 17: ARGENTARIVS, i. e. caelator, Inscr. Rein. cl. 11, n. 97.