sudatorium

英 [,s(j)uːdə'tɔːrɪəm] 美[sʊ'dɛrɪəm]

sudatorium (n.): "room in a bath for sweating," 1756, from Latin sudatus, past participle of sudare "to sweat," from sudor "sweat" (see sweat (v.)) + -orium (see -ory).