The Collaborative International Dictionary of English v.0.48:

Percheron \Per"che*ron\, n. [F.]
   One of a breed of draught horses originating in Perche, an
   old district of France; -- called also Percheron-Norman.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Percheron
    n 1: one of a breed of grey or black draft horses originally
         used in France to draw heavy coaches or artillery