LSJ
εως, ἡ, (< ξύω) ulceration, erosion, τοῦ ἐντέρου Hp. Acut. 60.
excoriation, Aret. CD 1.3.
scraping, filing, Hp. VC 14, cf. Gal. 14.781, Ammon. in Int. 23.21, PMed. in Arch.Pap. 4.270 ; polishing, EM 611.20. (ξύσις is f.l. in codd.).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
ἡ, das Schaben, Kratzen, Sp.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)