Medical Definition of stimulation
1: the act or process of stimulating
2: the stimulating action of various agents on muscles, nerves, or a sensory end organ by which activity is evoked; especially : the reaction produced in a sensory end organ by a stimulus that initiates a nerve impulse and results in functional activity of an effector (as a muscle or gland) <gastric secretion induced by stimulation of the sense of smell>
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