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life span

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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
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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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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Medical Dictionary

Main Entry: life span
Pronunciation: 'lIf-"span
Function: noun
1 : the duration of existence of an individual
2 : the averagelength of life of a kind of organism or of a material object especially in a particular environment or under specified circumstances
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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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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