LSJ
εως, ἡ, covering; roofing, IG4²(1).102.214, al. (Epid., iv BC), Inscr.Délos 459.9 (ii BC); also written στέγασσις, IG4²(1).103.60 (Epid., iv BC); στέγαξις, ib. 286.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
ἡ, das Bedecken, Dichtmachen (?).
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)