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Medical Term:


Pronunciation: re-spons'


  1. The reaction of a muscle, nerve, gland, or other excitable tissue to a stimulus.
  2. Any act or behavior, or its constituents, that a living organism is capable of emitting. Reflexes are usually excluded because they are typically elicited by a specifiable (unconditioned or natural) stimulus rather than emitted under circumstances in which the stimulus was not specifiable.

[L. responsus, an answer]

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