Source : Webster's Revised Unabridged Dictionary (1913)

Detuncate \De*tun"cate\, v. t. [imp. & p. p. {Detruncated}; p.
   pr. & vb. n. {Detruncating}.] [L. detruncatus, p. p. of
   detruncare to cut off; de + truncare to maim, shorten, cut
   off. See {Truncate}.]
   To shorten by cutting; to cut off; to lop off.