A.borer, auger, rotated by a thong (cf. τρυπάω), Od.9.385, cf. Pratin.Lyr.1.14, E.Cyc.461, Pl. Cra.388a, Nicoch.9, AP6.205 (Leon.); the boring-point of a siegeengine, Aen.Tact.32.5.
II. a surgical instrument, trepan, Hp. VC18; τ. ὀξὺ καὶ εὐθύ the straight-pointed trepan, Gal.19.129; τ. ἀβάπτιστον, another kind with a guard to prevent its piercing to the brain, Id.10.447.
2. metaph. of Pan, sens. obsc., Call.Fr.412.