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Meaning of stimulus

stim•u•lus

Pronunciation: (stim'yu-lus), [key]
— pl. -li
  1. something that incites to action or exertion or quickens action, feeling, thought, etc.: The approval of others is a potent stimulus.
  2. something that excites an organism or part to functional activity.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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