USSR
Concise Oxford English Dictionary © 2008 Oxford University Press:
USSR/juːesesˈɑː(r)/
▶abbreviation historical Union of Soviet Socialist Republics.
'USSR' also found in these Oxford entries:
Duma
- hammer and sickle
- kolkhoz
- kopek
- politburo
- rouble
- soviet
- Sovietologist
- Stakhanovite
- Supreme Soviet
- tovarish

