metonomatosisnonce-wd.|mɛˌtɒnəməˈtəʊsɪs| [f.Gr. µετα- (denoting change) + ὀνοµατ-, ὄνοµα name + -osis.] A change of name. 1827Hare GuessesSer. i. (1873) 132 The Jacobinical metonomatosis of the months, and of the days of the week, might be lookt upon as a parody of the Quakerian.