false-negative

[ fawls-neg-uh-tiv ]
/ ˈfɔlsˈnɛg ə tɪv /

noun Also false negative.

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.
  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

pertaining to or being a false-negative.

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020