pars pro toto
Definition from Wiktionary, the free dictionary
pars prō tōtō
- A type of metonymy in which an entity (person, object) is referred to by a (conspicuous) part, for the whole, e.g. a country by its capital.
- "Rome (says ...)" can just as well be a pars pro toto for Italy (in practice the Italian government) as a pars pro toto for the Roman Catholic church, notably the papacy as its universal government