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longevity

[lon-jev-i-tee, lawn-] /lɒnˈdʒɛv ɪ ti, lɔn-/
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 of longevity
1605-1615
1605-15; < Latin longaevitās. See longevous, -ity
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for longevity

longevity

/lɒnˈdʒɛvɪtɪ/
noun
1.
long life
2.
relatively long duration of employment, service, etc
Derived Forms
longevous (lɒnˈdʒiːvəs) adjective
Word Origin
C17: from Late Latin longaevitās, from Latin longaevus long-lived, from longuslong1 + aevum age
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for longevity
n.

1610s, from Late Latin longaevitatem (nominative longaevitas) "great age, long life," from Latin longaevus "long-lived," from longus (see long (adj.)) + aevum "lifetime, age" (see eon).

Online Etymology Dictionary, © 2010 Douglas Harper
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longevity in Medicine

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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