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life span

   Also found in: Dictionary/thesaurus, Legal, Encyclopedia, Wikipedia 0.01 sec.
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.

life span,
the length of life of an individual or the average length of life in a population or species.

life span
average duration of life in animals of the species in average circumstances where special treatment to maintain life is not provided. Called also characteristic life span—commonest age of senile death.
Laboratory animals and small pets—gerbil 3-4 yrs; guinea pig 1-8 yrs; hamster 15 mths-2 yrs; mice 2-3 yrs; rabbit 5-6 yrs; rats 3-4 yrs.
Domestic pets—cat 18-20 yrs; dog small and medium size 15 yrs; large breeds 10 yrs.
Farm animals—cattle 9-11 yrs; sheep 5-6 yrs; goat 8-10 yrs; pig 8-10 yrs; domestic poultry 5-6 yrs; geese—no data but apparently much longer than other domestic birds; horse 25-30 yrs.


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Numerous studies have found that calorie restriction can extend the life span of organisms such as yeast, worms, fruit flies, and mice.
Longest-Known Life Span 200 Humans 122 Indian Elphant 78 Blue Whale 80 Sturgen (fish) 100 Giant Galapagos Tortoise 200 Note: Table made from bar graph.
Tom Tatman, the company's president, said diversity was the key to the foundry's long life span.
 
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