'Natatorium' definitions:

Definition of 'natatorium'

From: WordNet
noun
Pool that provides a facility for swimming; "`swimming bath' is a British term" [syn: swimming pool, swimming bath, natatorium]

Definition of 'Natatorium'

From: GCIDE
  • Natatorium \Na`ta*to"rium\, n. [L.] A swimming bath. [1913 Webster]