Chamfron

from WordNet (r) 3.0 (2006)

chamfron
    n 1: medieval plate armor to protect a horse's head [syn:
         {chanfron}, {chamfron}, {testiere}, {frontstall}, {front-
         stall}]

from The Collaborative International Dictionary of English v.0.48

Chamfron \Cham"fron\, n. [F. chanfrein.] (Anc. Armor)
   The frontlet, or head armor, of a horse. [Written also
   {champfrain} and {chamfrain}.]
   [1913 Webster]

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