LSJ
ατος, τό, (< τρίβω) that which is rubbed; metaph, like τρίβων² 2, a practised knave, Ar. Nu. 260, Av. 431.
a drink or brew prepared of pounded groats and spices, Alex. 188, Sotad.Com. 1.4, Axionic. 4.8 (anap.); τριμμάτων πλῆθος Diocl. Fr. 138; ὅπως λαβὼν παρ ἐμοῦ… σησάμου τέταρτον τρίψῃ μοι… τ. UPZ 62.21 (ii BC); = ἀρωματίζον τόμα ἐν γάμοις πινόμενον, Hsch.
fragments, μοχλῶν IG2². 1672.303 (τρινματα lapis), cf. 7.3073.165 (Lebad., ii BC); scrapings, Hp. Nat. Mul. 32.
abrasion, Gal. 13.181.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)