The Collaborative International Dictionary of English v.0.48:

Cornute \Cor"nute\ (k?r"n?t or k?r-n?t"), Cornuted \Cor*nut"ed\
   (k?r-n?"t?d), a. [L. cornutus horned, from cornu horn.]
   1. Bearing horns; horned; horn-shaped.
      [1913 Webster]

   2. Cuckolded. [R.] "My being cornuted." --LEstrange.
      [1913 Webster]