hypŏgēus, a, um, adj., = ὑπόγαιος,
underground : loca, Cael. Aur. Tard. 2, 37, 191.—Hence, subst.: hypŏgēum or hy-pŏgaeum , i, n., = ὑπόγειον (ὑπόγαιον), a vault or cellar under ground , Vitr. 6, 11; a burying-vault , sepulchre , Petr. 111, 2; Inscr. Grut. 1114, 3.