Source : Webster's Revised Unabridged Dictionary (1913)

   {Nerve fiber} (Anat.), one of the fibers of which nerves are
      made up. These fibers are either {medullated} or
      {nonmedullated}. in both kinds the essential part is the
      translucent threadlike axis cylinder which is continuous
      the whole length of the fiber.

   {Nerve stretching} (Med.), the operation of stretching a
      nerve in order to remedy diseases such as tetanus, which
      are supposed to be influenced by the condition of the
      nerve or its connections.

Source : WordNet®

nerve fiber
     n : a threadlike extension of a nerve cell [syn: {nerve fibre}]