: of, relating to, resembling, producing, or mediating the parasympathetic effects (such as a slowed heart rate and increased activity of smooth muscle) produced by muscarinemuscarinic receptors — compare nicotinic
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: relating to, resembling, producing, or mediating the effects (as a slowed heart rate, increased secretion by exocrine glands, and increased activity of smooth muscle) that are produced on organs and tissues by acetylcholine liberated by postganglionic nerve fibers of the parasympathetic nervous system and that are mimicked by muscarinemuscarinic receptorsatropine is a muscarinic antagonist — compare nicotinic