| Noun | 1. | parasympathetic - 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 Synonyms: parasympathetic nervous system |
| Adj. | 1. | parasympathetic - of or relating to the parasympathetic nervous system |