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lifespan

 - 1 dictionary result
life span or life·span   (līf'spān')
n.  

  1. A lifetime.

  2. The average or maximum length of time an organism, material, or object can be expected to survive or last.

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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