The Collaborative International Dictionary of English v.0.48:

Armorial \Ar*mo"ri*al\, a. [F. armorial, fr. armoiries arms,
   coats of arms, for armoieries, fr. OF. armoier to paint arms,
   coats of arms, fr. armes, fr. L. arma. See Arms, Armory.]
   Belonging to armor, or to the heraldic arms or escutcheon of
   a family.
   [1913 Webster]

         Figures with armorial signs of race and birth.
                                                  --Wordsworth.
   [1913 Webster]

   Armorial bearings. See Arms, 4.
      [1913 Webster] Armoric