life-span

life span

noun
1.
the longest period over which the life of any organism or species may extend, according to the available biological knowledge concerning it.
2.
the longevity of an individual.

Origin:
1915–20

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Collins
World English Dictionary
life span
 
n
the period of time during which a human being, animal, machine, etc, may be expected to live or function under normal conditions

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Medical Dictionary

life span n.

  1. A lifetime.

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

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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