cuisse

from WordNet (r) 3.0 (2006)

cuisse
    n 1: armor plate that protects the thigh

from The Collaborative International Dictionary of English v.0.48

Cuish \Cuish\ (kw?s), n. [F. cuisse thigh, fr. L. coxa hip: cf.
   F. cuissard, OF, cuissot, armor for the thigh, cuish. Cf.
   {Hough}.]
   Defensive armor for the thighs. [ Written also {cuisse}, and
   {quish}.]
   [1913 Webster]