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stimulus

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stimulus

Change in the environment of an organism that the organism can detect and respond to. These changes may be noise, light, heat, or pressure. The changes are detected by specialized cells called receptors. The skin contains many receptors for heat, touch, pressure, and pain. Sometimes the receptors are found in an organ which is so specialized for this purpose it is called a sense organ - for example the eye. See sensitivity.
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? Mentioned in ? References in classic literature
 
So I forced myself from my lethargy of despair and grief; and this thought, the sweetest thought of all my life, may or may not have been my unrealized stimulus ere now; it was in very deed my most conscious and perpetual spur henceforth until the end.
Dead Men Tell No Tales by Hornung, E. W. View in context
The consummating death I show unto you, which becometh a stimulus and promise to the living.
Thus Spake Zarathustra: A Book For All And None by Nietzsche, Friedrich View in context
Not a few openly avowed themselves converted to antagonism; the rest needed only a slight stimulus to make a similar avowal.
Flatland by Abbott, Edwin View in context
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