Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† ōdēum, i, n., = ᾠδεῖον, a public building aesigned for musical performances, an odeon, Vitr. 5, 9; Suet. Dom. 5; cf. Eutr. 7, 24; Tert. Res. Carn. 42; Amm. 16, 10, 14.