τρῐβ-εύς · trib-eus — LSJ
rubber, masseur, PCair.Zen. 675.1 (iii B. C.), PLond. ined. 2087 (iii B. C.), Str. 15.1.55.
= δοῖδυξ, pestle, Gal. 13.850, AB 239, Gloss.; = ἀλετρίβανος, EM 59.57.
in Mechanics, a rim or flange to take the pressure of a nut, Ph. Bel. 53.19; = ἐντορνία, Hero Bel. 97.11.