ὑπόξῠλος · hypoxylos — LSJ
wooden underneath, i.e. of wood covered with a coat of some precious metal, A. Fr. 286, X. Oec. 10.3, cf. IG 1(2).280.78, al., 2(2).1388.76, Ar. Fr. 881, Alex. 192; κοίτη ὑ. κατάχρυσος IG 1(2).280.79; βωμός J. AJ 3.6.8; [θεοὶ] τὰ ἔνδον ὑ. Luc. JTr. 8.
metaph., spurious, counterfeit, Men. Per.Fr. 7; of poets, etc., Phryn. PS p.115 B.