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stimulus science definition
Plural stimuli stimuli
- Physiology Something that can elicit or evoke a physiological response in a cell, a tissue, or an organism. A stimulus can be internal or external. Sense organs, such as the ear, and sensory receptors, such as those in the skin, are sensitive to external stimuli such as sound and touch.
- Something that has an impact or an effect on an organism so that its behavior is modified in a detectable way. See more at classical conditioning.
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