Source : Webster's Revised Unabridged Dictionary (1913)

Peytrel \Pey"trel\, n. [OF. peitral. See {Poitrel}.] (Anc.
   Armor)
   The breastplate of a horse's armor or harness. [Spelt also
   {peitrel}.] See {Poitrel}. [Obs.] --Chaucer.