A natatorium is, strictly speaking, a structurally separate building containing a swimming pool. In Latin, a cella natatoria was a swimming pool in its own building; thus, the sense was much as now although it is sometimes also used to refer to any indoor pool even if not housed in a dedicated building (e.g. a pool in a school or a fitness club).[1] It is usually taken for granted that it will also house locker rooms, and perhaps capacity for allied activities, such as a diving tank, facilities for water polo, and so forth. Many colleges and universities have natatoria.
The third of the four Galena chain lakes in Washington state, USA[1]. So named because it was used for such purposes by the Mazamas in 1906, according to regulations, the women forenoons and men afternoon.
