Antiphonal :: Antiphonal (a.) Of or pertaining to antiphony, or alternate singing; sung alternately by a divided choir or opposite choirs..
Antiphonal :: Antiphonal (n.) A book of antiphons or anthems.
Antiphonary :: Antiphonary (n.) A book containing a collection of antiphons; the book in which the antiphons of the breviary, with their musical notes, are contained..