en.wiktionary.orgjoukkoerotus - Wiktionary, the free dictionary From Wiktionary, the free dictionary joukko + erotus IPA(key): /ˈjou̯kːoˌerotus/, [ˈjo̞u̯kːo̞ˌe̞ro̞t̪us̠] Rhymes: -erotus Hyphenation(key): joukko‧ero‧tus joukkoerotus (set theory) relative complement, set-theoretic difference, set difference