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prevalence

[prev-uh-luh ns]
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noun
  1. the condition of being prevalent, or widespread: the prevalence of AIDS in developing countries.
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Sometimes prev·a·lent·ness.
Related formsnon·prev·a·lence, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Word Origin and History for prevalence

n.

1590s, "fact of having mastery," from Middle French prévalence (15c.), from Late Latin praevalentia, from praevalens, present participle of praevalere (see prevalent). Meaning "condition of being widespread or general" is from 1713.

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Online Etymology Dictionary, © 2010 Douglas Harper

prevalence in Medicine

prevalence

(prĕvə-ləns)
n.
  1. The total number of cases of a disease in a given population at a specific time.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.