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WordReference Random House Unabridged Dictionary of American English © 2024par•a•sym•pa•thet•ic (par′ə sim′pə thet′ik),USA pronunciation [Anat., Physiol.,]adj. - Anatomy, Physiology, Physiologypertaining 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 sympathetic system, as in inhibiting heartbeat or contracting the pupil of the eye.
- para-1 + sympathetic 1900–05
Collins Concise English Dictionary © HarperCollins Publishers:: parasympathetic /ˌpærəˌsɪmpəˈθɛtɪk/ adj - 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
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