antistress

Science Dictionary
stress  [%PREMIUM_LINK%]     (strěs)  Pronunciation Key 
  1. The force per unit area applied to an object. Objects subject to stress tend to become distorted or deformed. Compare strain. See also axial stress, shear stress., See more at Hooke's law.

    1. A physiologic reaction by an organism to an uncomfortable or unfamiliar physical or psychological stimulus. Biological changes result from stimulation of the sympathetic nervous system, including a heightened state of alertness, anxiety, increased heart rate, and sweating.

    2. The stimulus or circumstance causing such a reaction.


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