LSJ
ῶνος, ὁ, cucumber-bed, Eust. 291.36, etc. as pr. n. Σικυών, ῶνος, ἡ, Sicyon, Pi. N. 9.53, etc. ; also ὁ, X. HG 4.2.14, 7.2.11; gender indeterm. in Il. 2.572, 23.299; as Adj., γῆ Σ. Arist. Fr. 640.26; — regul. Adj. Σικυώνιος, α, ον, Sicyonian, Th. 1.28, etc. ; Σ. ἔλαιον Sicyonian olive oil, Dsc. 1.30, Gal. 11.739 (but σικυώνιον ἔλαιον oil of σίκυς, Aët. 1.122, Alex.Trall. Febr. 3, Paul.Aeg. 3.77, 7.20); Σικυωνικός or σικυιακός, ή, όν, Callix. 2, Ath. 6.271d. — Adv. Σικυώνοθε, of or from Sicyon, Pi. N. 9.1. — The people themselves called their town Σεκυών, A.D. Adv. 144.20, cf. Σεκυώνιοι GDI 2581.273 (Delph., ii BC); its oldest name was Αἰγιαλεῖς and then Μηκώνη, acc. to Str. 8.6.25.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
ῶνος, ὁ, ein mit Pfeben oder Gurken bepflanzter Ort, Sp.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)