1. [n]  bound collection of antiphons
2. [adj]  relating to or resembling an antiphon
3. [adj]  (religion) containing or using responses or antiphons recited or sung in alternation; "responsive reading"; "antiphonal liturgy"

ANTIPHONAL is a 10 letter word that starts with A.

1. \An*tiph"o*nal\, a.
   Of or pertaining to antiphony, or alternate singing; sung
   alternately by a divided choir or opposite choirs. --Wheatly.
   -- {An*tiph"o*nal*ly}, adv.
   
   

2. \An*tiph"o*nal\, n.
   A book of antiphons or anthems.