I. |parə+ adjective
Etymology: International Scientific Vocabulary para- (I) + sympathetic
1. : of or relating to the parasympathetic nervous system
parasympathetic fibers of the vascular wall
2. : acting on or originating in the parasympathetic nervous system
parasympathetic drugs
parasympathetic inhibition
II. noun
1. : a parasympathetic nerve
2. : parasympathetic nervous system
stimulation of the parasympathetic tends to increase smooth muscle tone