What we have here is not a 'multiculture' as it is represented in multiculturalism, not a pluralist order of discrete patches of culture, all somehow, 'equally valid' within the polity, but—to form a Greek/Roman Creole—a polyculture, or at any rate a collection of cultural entities that are not (a) discrete and complete in themselves; (b) that are not in any sense 'intrinsically' 'equal'; and (c) are active together and hence bound up with change.
Source: wiktionary
Marsdsen, R. (1993) 'Global Monoculture, Multiculture and Polyculture', Social Research 60 (3): 493–523.
Source: wiktionary
Finally, but equal in importance, this book aims to engage with the ongoing dialogue among scholars of race and ethnicity in America, specifically regarding conversations on the issues of multiculture, polyculture, and the persistence of race.
Source: wiktionary
Europe/the EU's internal collective group identity is polycultural and not yet multicultural as per its “United in Diversity” motto. The concept of polyculture is a borrowed term from the discipline of agriculture. […] This paper adds a third definition to these two definitions by proposing to include the dominant culture within the fold of the polyculture to make it a multicultural society.
Source: wiktionary