- the part of the nervous system comprising the brain and spinal cord.
- the mass of nerve tissue that controls and coordinates the activities of an animal. In vertebrates it consists of the brain and spinal cordAbbreviation: CNS Compare autonomic nervous system
- The portion of the vertebrate nervous system consisting of the brain and spinal cord.cerebrospinal axis
- The part of the nervous system in vertebrate animals that consists of the brain and spinal cord. Compare peripheral nervous system.