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Clerical position in the Eastern Orthodox Church
A protoiereus (from Ancient Greek: πρωτοϊερεύς, "first priest", Modern Greek: πρωθιερέας), or protopriest in the Eastern Orthodox Church, is a priest usually coordinating the activity of other subordinate priests in a larger church. The title is roughly equivalent to that of protopope or archpriest.
References
Даль В. И. Толковый словарь живого великорусского языка. М.:"Русский язык", 2000. ISBN5-200-02794-2. Vol. 3, page 394