The Collaborative International Dictionary of English v.0.48:

Ave \A"ve\, n. [L., hail.]
   1. An ave Maria.
      [1913 Webster]

            He repeated Aves and Credos.          --Macaulay.
      [1913 Webster]

   2. A reverential salutation.
      [1913 Webster]

            Their loud applause and aves vehement. --Shak.
      [1913 Webster]