The Collaborative International Dictionary of English v.0.48:

CNS \CNS\ n.
   acronym for central nervous system the portion of the
   vertebrate nervous system consisting of the brain and spinal
   cord.

   Syn: central nervous system.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

CNS
    n 1: the portion of the vertebrate nervous system consisting of
         the brain and spinal cord [syn: central nervous system,
         CNS, systema nervosum centrale]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

CNS
       Certified Novell Salesperson (Novell, Netware)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

CNS
       Complimentary Network Service


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

CNS
       Compuserve Network Services (CIS)