OFFERTORIUM (Fr. Offertoire). A portion of a Psalm, or Verse from some other part of Holy Scripture, sung by the Choir, at High Mass, immediately after the Credo, during the time occupied by the Priest in making ready the Oblations. and offering them upon the Altar.
A proper Offertorium is appointed for every Festival and Feria in the year, except Good Friday and the Saturday in Holy Week; and the Plain Chaunt Melodies adapted to the entire series are contained in...