The Collaborative International Dictionary of English v.0.48:

Delignate \De*lig"nate\, v. t. [imp. & p. p. Delignated; p.
   pr. & vb. n. Delignating.] [Pref. de- + L. lignum wood.]
   1. To clear or strip of wood (by cutting down trees). [R.]
      --Fuller.
      [Webster 1913 Suppl.]

   2. To strip or remove the wood from; as, to delignate ramie,
      in the preparation of ribbons of the fiber for further
      working.
      [Webster 1913 Suppl.]