The Collaborative International Dictionary of English v.0.48:

Canting \Cant"ing\, a.
   Speaking in a whining tone of voice; using technical or
   religious terms affectedly; affectedly pious; as, a canting
   rogue; a canting tone. -- Cant"ing*ly, adv. --
   Cant"ing*ness, n.
   [1913 Webster]

   Canting arms, Canting heraldry (Her.), bearings in the
      nature of a rebus alluding to the name of the bearer.
      Thus, the Castletons bear three castles, and Pope Adrian
      IV. (Nicholas Breakspeare) bore a broken spear.
      [1913 Webster]