Edinoverie

Edinoverie (Russian: единове́рие, IPA: [jɪdʲɪnɐˈvʲerʲɪjɪ], literally “coreligionism”) is an arrangement between certain Russian Old Believer communities and the official Russian Orthodox Church, whereby such communities are treated as a part of the normative Church system while maintaining their own rites. Thus, they are often designated "Old Ritualists" (Russian: старообря́дцы, staroobryadtsy), as opposed to "Old Believers".