hypaethrus or -os, a, um, adj., = u(/paiqros, that is in the open air, uncovered.I.Adj.: ambulationes, Vitr. 5, 9 med.: loca (with aperta), id. ib.—II.Subst.A. hy-paethros, i, m., a temple open or without roof, Vitr. 3, 2, 1.—B. hypaethrum, i, n., an open building, Dig. 33, 7, 12, 20; id. 50, 16, 242, 2.—C. hypaethra, ōrum, n., uncovered, open walks, Vitr. 1, 2.