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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
1915-1920
1915-20
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for life span
  • As researchers study these bugs, their life span will become better known.
  • Smokers have the added bonus of a relatively short life span, so you run less risk of seeing them twice.
  • As for the helicopter, it hasn't gone into the drink yet, despite the researchers' fears about its life span.
  • Anywhere in there is a normal life span, even though the ninety-year-old got fifty per cent more life.
  • Yet the drug ekes out only two more months of increased life span on average than do other cancer drugs.
  • Cutting calories has been shown to increase the life span of some animals and protect them from signs of aging and disease.
  • And if the wasted energy weren't bad enough, computer memory has a limited life span.
  • The life span of muon is not symmetric property between the sea level and muon.
  • One day life span with lengthen tremendously due to science.
  • Directly measuring the red cell life span with radioactive tagging techniques shows a shortened life span.
British Dictionary definitions for life span

life span

noun
1.
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 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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life span in Medicine

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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Difficulty index for life span

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Word Value for life

7
8
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