Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: parasympathetic nervous system
  1. 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
    - parasympathetic

Derived forms: parasympathetic nervous systems

Type of: nervous system, systema nervosum

Part of: ANS, autonomic nervous system

Encyclopedia: Parasympathetic nervous system