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longevity

[lon-jev-i-tee, lawn-] Origin

lon·gev·i·ty

[lon-jev-i-tee, lawn-]
noun
1.
a long individual life; great duration of individual life: Our family is known for its longevity.
2.
the length or duration of life: research in human longevity.
3.
length of service, tenure, etc.; seniority: promotions based on longevity.

Origin:
1605–15; < Latin longaevitās. See longevous, -ity
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Longevity is always a great word to know.
So is doohickey. Does it mean:
a scrap or morsel of food left at a meal.
a gadget; dingus; thingumbob.
Collins
World English Dictionary
longevity (lɒnˈdʒɛvɪtɪ)
 
n
1.  long life
2.  relatively long duration of employment, service, etc
 
[C17: from Late Latin longaevitās, from Latin longaevus long-lived, from longuslong1 + aevum age]
 
longevous
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

longevity
1615, from L.L. longævitas "great age, long life," from L. longævus "long-lived," from longus "long" (adj.) + ævum "lifetime, age."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

longevity lon·gev·i·ty (lŏn-jěv'ĭ-tē)
n.
Duration of an individual life beyond the norm for the species.

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