decollating

from The Collaborative International Dictionary of English v.0.48

decollate \de*col"late\ (d[-e]*k[o^]l"l[=a]t), v. t. [imp. & p.
   p. {Decollated}; p. pr. & vb. n. {Decollating}.] [L.
   decollatus, p. p. of decollare to behead; de- + collum neck.]
   To sever from the neck; to behead; to decapitate.
   [1913 Webster]

         The decollated head of St. John the Baptist. --Burke.
   [1913 Webster]