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stimulus

 - 5 dictionary results

stim⋅u⋅lus

[stim-yuh-luhs]
–noun, plural -li [-lahy] .
1. something that incites to action or exertion or quickens action, feeling, thought, etc.: The approval of others is a potent stimulus.
2. Physiology, Medicine/Medical. something that excites an organism or part to functional activity.

Origin:
1605–15; < L: a goad


1. incitement, enticement, motive, provocation. 2. stimulant.


1. discouragement.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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stim·u·lus   (stĭm'yə-ləs)   
n.   pl. stim·u·li (-lī')
  1. Something causing or regarded as causing a response.

  2. An agent, action, or condition that elicits or accelerates a physiological or psychological activity or response.

  3. Something that incites or rouses to action; an incentive: "Works which were in themselves poor have often proved a stimulus to the imagination" (W.H. Auden).


[Latin, goad.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: stim·u·lus
Pronunciation: 'stim-y&-l&s
Function: noun
Inflected Form: plural stim·u·li /-"lI,-"lE/
1 : STIMULANT 1
2 : an agent (as an environmental change) that directlyinfluences the activity of living protoplasm (as by exciting a sensory organ or evoking muscular contraction or glandular secretion) stimulus>
Medical Dictionary

stimulus stim·u·lus (stĭm'yə-ləs)
n. pl. stim·u·li (-lī')

  1. A stimulant.

  2. That which can elicit or evoke an action or response in a cell, an excitable tissue, or an organism.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
stimulus   (stĭm'yə-ləs)  Pronunciation Key 
Plural stimuli (stĭm'yə-lī')
  1. 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.

  2. 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.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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