The Collaborative International Dictionary
Decollating
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.
The decollated head of St. John the Baptist.
--Burke.
Wiktionary
decollating
vb. (present participle of decollate English)