Source : Webster's Revised Unabridged Dictionary (1913)

Neural \Neu"ral\, a. [Gr. ? nerve.] (Anat. & Zo["o]l.)
   relating to the nerves or nervous system; taining to,
   situated in the region of, or on the side with, the neural,
   or cerebro-spinal, axis; -- opposed to {hemal}. As applied to
   vertebrates, neural is the same as {dorsal}; as applied to
   invertebrates it is usually the same as ventral. Cf. {Hemal}.

   {Neural arch} (Anat.), the cartilaginous or bony arch on the
      dorsal side of the centrum of the vertebra in a segment of
      the spinal skeleton, usually inclosing a segment of the
      spinal cord.

Source : WordNet®

neural arch
     n : a structure arising dorsally from a vertebral centrum and
         enclosing the spinal cord [syn: {vertebral arch}]