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[par-uh-sim-puh-thet-ik] /ˌpær əˌsɪm pəˈθɛt ɪk/

adjective, Anatomy, Physiology,
pertaining to that part of the autonomic nervous system consisting of nerves and ganglia that arise from the cranial and sacral regions and function in opposition to the system, as in inhibiting heartbeat or contracting the pupil of the eye.
(anatomy, physiol) of or relating to the division of the autonomic nervous system that acts in opposition to the sympathetic system by slowing the heartbeat, constricting the bronchi of the lungs, stimulating the smooth muscles of the digestive tract, etc Compare sympathetic (sense 4)

1905, from para- (1) “beside” + sympathetic.

parasympathetic par·a·sym·pa·thet·ic (pār’ə-sĭm’pə-thět’ĭk)
Of, relating to, or affecting the parasympathetic nervous system.
par’a·sym’pa·thet’i·cal·ly adv.


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  • Parasympathetic nerve

    parasympathetic nerve n. One of the nerves of the parasympathetic nervous system.

  • Parasympathetic nervous system

    parasympathetic nervous system n. The part of the autonomic nervous system originating in the brain stem and the lower part of the spinal cord that, in general, inhibits or opposes the physiological effects of the sympathetic nervous system, as in tending to stimulate digestive secretions or slow the heart. parasympathetic nervous system (pār’ə-sĭm’pə-thět’ĭk) The part […]

  • Parasympatholytic

    parasympatholytic par·a·sym·pa·tho·lyt·ic (pār’ə-sĭm’pə-thō-lĭt’ĭk) adj. Blocking the effects of the parasympathetic nervous system.

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