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stimulant

stim·u·lant [ stímmyələnt ]


noun  (plural stim·u·lants)
Definition:
 
1. source of stimulus: something that provides a stimulus, incentive, or quickening

2. pharmacology agent producing increase in functional activity: a drug or other agent that produces a temporary increase in the functional activity of a body organ or part



adjective 
Definition:
 
increasing activity: increasing physical activity or acting as a stimulus or incentive

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