false negative

noun

plural false negatives
: a person or test result that is incorrectly classified as negative (as for the presence of a health condition) because of imperfect testing methods or procedures
A false negative, in medical lingo, is a screening test that says "no cancer" when all the while a cancer is, in fact, growing undetected.Robin Marantz Henig
often hyphenated when used before another noun
a false-negative rate of 5%
… only 4 of 31 tears found on arthroscopic evaluation were missed prospectively by MRI, and two of these false-negative results were found retrospectively to be due to observer error rather than failure of the MRI system to image the tear.Peter D. Franklin et al.
compare false positive

Examples of false negative in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This can result in more false negatives and delays in diagnosis. Sandra Rose Salathe, Flow Space, 23 Oct. 2024 Even if two radiologists read every mammogram (as is standard practice in the U.K.), there is still a likelihood of false negatives. Ainsley MacLean, Forbes, 27 Sep. 2024 Another detected breast cancer faster and more accurately than human radiologists, reducing both false positives and false negatives. Par Chadha, Forbes, 7 Oct. 2024 Are errors more likely to result in false positives or false negatives? Robert Pearl, Forbes, 30 Sep. 2024 See all Example Sentences for false negative 

Word History

First Known Use

1916, in the meaning defined above

Time Traveler
The first known use of false negative was in 1916

Dictionary Entries Near false negative

Cite this Entry

“False negative.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/false%20negative. Accessed 22 Nov. 2024.

Medical Definition

false negative

noun
: a person or test result that is incorrectly classified as negative (as for the presence of a health condition) because of imperfect testing methods or procedures
"The addition of the lateral chest radiograph to the frontal view did not improve the diagnostic accuracy of pediatric emergency physicians," he [Dr. Lynch] concluded, "and it may also increase the percentage of false negatives."Terry Murray, Medical Post
Previous studies of sentinel nodes have revealed some false negatives (i.e., women with a normal sentinel node who nonetheless had other axillary node metastases revealed on total dissection).Bill Zepf, American Family Physician
… testing for heterophile antibodies was negative, but false negative results are well recognized.Lindley A. Barbee et al., The New England Journal of Medicine
often hyphenated when used before another noun
false-negative results
… any false-negative smears would again underestimate the prevalence of abnormal test results.Jeanne Mandelblatt et al., The Journal of the American Medical Association
compare false positive
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!