Michael Prokurat, Alexander Golitzin, Michael D. Peterson
PROKEIMENON
PROKEIMENON. Psalm verses sung before the Epistle and Gospel readings, and at Vespers after the entrance, similar to the Gradual in the West. (The definition of the term in Webster’s Third International is in error insofar as it lists the prokeimenon as read before the Apocalypse. The Apocalypse is not read liturgically in the Eastern Church.)