The Collaborative International Dictionary of English v.0.48:

Core \Core\, v. t. [imp. & p. p. Cord (k?rd); p. pr. & vb. n.
   Coring.]
   1. To take out the core or inward parts of; as, to core an
      apple.
      [1913 Webster]

            He's like a corn upon my great toe . . . he must be
            cored out.                            --Marston.
      [1913 Webster]

   2. To form by means of a core, as a hole in a casting.
      [1913 Webster]

   3. To extract a cylindrical sample from, with a boring
      device. See core[8].
      [PJC]