Bible Encyclopedias
Pentecostarion

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

one of the service-books of the Greek Church, containing the office of the Church from Easter-day till the eighth day after Pentecost, which they called the Sunday of All-Saints.

Bibliography Information
McClintock, John. Strong, James. Entry for 'Pentecostarion'. Cyclopedia of Biblical, Theological and Ecclesiastical Literature. https://www.studylight.org/​encyclopedias/​eng/​tce/​p/pentecostarion.html. Harper & Brothers. New York. 1870.