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]