a society in an advanced state of social development (e.g., with complex legal and political and religious organizations); "the people slowly progressed from barbarism to civilization"
the social process whereby societies achieve civilization
a major part of the central nervous system which conducts sensory and motor nerve impulses to and from the brain; a long tubelike structure extending from the base of the brain through the vertebral canal to the upper lumbar region
the junction between two neurons (axon-to-dendrite) or between a neuron and a muscle; "nerve impulses cross a synapse through the action of neurotransmitters"