ὑπερθύριον · hyperthyrion — LSJ
lintel of a door or gate, Od. 7.90; ὑπερθυρίοις ἀραρυῖαι ἑπτὰ πύλαι Hes. Sc. 271:—in Prose, ὑπέρθῠρον, τό, Hdt. 1.179, IG 1(2).372.201, 42(1).103 B 97 (Epid., iv B. C.), 11(2).145.19 (Delos, iv/iii B. C.), Inscr.Délos 442 B 70 (ii B. C.), J. BJ 5.5.3, Plu. QConv. 2.684a, etc.; also in Parm. 1.12, Herod. 2.65 (pl.).
Lat. hyperthyrum, frieze over the lintel, Vitr. 4.6.2.