- 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
WordReference Random House Unabridged Dictionary of American English © 2026
par•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
'parasympathetic' also found in these entries (note: many are not synonyms or translations):