from The Century Dictionary and Cyclopedia
- n. Same as gradual, 2.
Sorry, no etymologies found.
If I could find my copy of the Latin GIRM I would weigh into the fray by insisting that although the "Gathering Hymn" and "Responsorial Psalm" are indeed permitted options, the introit and graduale are the preferred options.
It thus included generically the antiphons and antiphonal chants sung by cantor, congregation, and choir at Mass (antiphonarium Missarum, or graduale) and at the canonical Hours (antiphonarium officii); but now it refers only to the sung portions of the Divine Office or Breviary.
In the early Middle Ages the responsorium graduale was still sung at every Mass, and not replaced, as at present, by an Alleluia in Eastertide.
He is said to dwell mainly upon the proper manner of performing the antiphonary and the graduale.