central nervous system

system of the body that includes the brain, spinal chord, nerves and ganglions

The central nervous system (CNS) represents the largest part of the nervous system, including the brain and the spinal cord. Together with the peripheral nervous system, it has a fundamental role in the control of behavior. The CNS is contained within the dorsal cavity, with the brain within the cranial subcavity, and the spinal cord in the spinal cavity. The CNS is covered by the meninges. The brain is also protected by the skull, and the spinal cord is also protected by the vertebrae.
See more at Wikipedia.org...

Central nervous system n. Abbr. CNS The portion of the vertebrate nervous system consisting of the brain and spinal cord. [more]Central nervous system - Community and Resources

Noun
1. the portion of the vertebrate nervous system consisting of the brain and spinal cord
(synonym) CNS, systema nervosum centrale
(hypernym) system
(part-holonym) nervous system, systema nervosum
(substance-meronym) white matter, substantia alba
(part-meronym) neuroglia, glia

The central nervous system is that part of the nervous system consisting of the brain and spinal cord.