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Definitions:
Noun
parasympathetic nervous system
parasympathetic
Definition: originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels
Definition: A parasympathetic nerve.
Adjective
parasympathetic
Definition: of or relating to the parasympathetic nervous system
Definition: Of or relating to the part of the autonomic nervous system that inhibits or opposes the effects of the sympathetic nervous system. It consists of nerves arising from the brain and the lower end of the spinal cord and supplying the internal organs, blood vessels, and glands.