hypaethrus or -os, a, um, adj., = ὕπαιθρος, that is in the open air, uncovered. Adj.: ambulationes, Vitr. 5, 9 med.: loca (with aperta), id. ib.

— Subst. hy-paethros, i, m., a temple open or without roof, Vitr. 3, 2, 1.

— hypaethrum, i, n., an open building, Dig. 33, 7, 12, § 20; id. 50, 16, 242, § 2.

— hypaethra, ōrum, n., uncovered, open walks, Vitr. 1, 2.