γύαλον

A. hollow, in Il. always of the breast- or back-piece of the cuirass, [θώρηκα] γυάλοισιν ἀρηρότα Il. 15.530: sg., usu. of the front-piece, 5.99, al.

2. hollow of a vessel, κρατήρων γ. E. IA 1052 (lyr.); hollow vessel, χρυσοῦ γέμοντα γύαλα θησαυροὺς βροτῶν Id. Andr. 1093 (v. infr. 4).

3. κοίλας πέτρας γ. hollow of a rock, S. Ph. 1081 (lyr.); cavern, πέτρινα [μύχατα] γύαλα E. Hel. 189 (lyr.).

4. pl., of hollow ground, vales, dells, γυάλοις ὕπο Παρνησοῖο Hes. Th. 499, cf. h.Ap. 396; Νύσης h.Hom. 26.5; γ. Θεράπνας Pi. N. 10.56 (but γ. Πυθῶνος, Φοίβου Id. P. 8.63, E. Ph. 237 (lyr.), cf. Ion 245, S. Fr. 460, may perh. refer to the rock-chambers of Delphi, cf. γύαλα· θησαυροί, ταμιεῖα, Hsch., and so perh. in E. Andr. 1093 (v. supr.)); Λύδιά τ’ ἂγ γύαλα throughout the vales of Lydia, A. Supp. 550 (lyr.); γύαλα χώρας Ar. Th. 110 (lyr.); αἰθέρια γύαλα the vault of heaven, Opp. C. 1.281, cf. Orph. H. 19.16.