LSJ
ατος, τό, that which is wrapped round, Poll. 7.91, Sch. Ar. Nu. 10.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
τό, das, was man herumwindet ; Schol. Ar. Nub. 10 ; Poll.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)