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false-negative

[fawls-neg-uh-tiv] /ˈfɔlsˈnɛg ə tɪv/
noun, Also, false negative
1.
Medicine/Medical.
  1. a test result that is incorrect because the test failed to recognize an existing condition or finding.
  2. a person who receives this test result.
2.
  1. any screening test result that failed to detect a person or thing being sought:
    Let's hope the new body scanner doesn't give us any false-negatives.
  2. a person or thing that is missed by such a test:
    Retrain your spam filter if you’re getting too many false-negatives in your inbox.
adjective
3.
pertaining to or being a false-negative.
Compare false-positive.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for false negative

false negative

noun
1.
a result in a medical test that wrongly indicates the absence of the condition being tested for
2.
a person from whom such a result is obtained
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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Contemporary definitions for false negative
noun, adjective

a test result that is read as negative but actually is positive, a test that shows no evidence of a disease when it is actually present; also written false-negative

noun, adjective
Dictionary.com's 21st Century Lexicon
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false negative in Medicine

false negative n.
A negative test result when the attribute for which the subject is being tested actually exists in that subject.


false'-neg'a·tive adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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