The Collaborative International Dictionary of English v.0.48:

Skeletonize \Skel"e*ton*ize\, v. t. [imp. & p. p.
   Skeletonized; p. pr. & vb. n. Skeletonizing.]
   To prepare a skeleton of; also, to reduce, as a leaf, to its
   skeleton. --Pop. Sci. Monthly.
   [1913 Webster]