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  false negative

  noun

  a result in a medical test that wrongly indicates the absence of the condition being tested for

false-negative

American  

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

noun

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.

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adjective

1. pertaining to or being a false-negative.

false negative British  

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

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Etymology

Origin of false-negative

First recorded in 1915–20

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Example Sentences

See Examples For:

false-negative false negative

The 99.86% sensitivity translated to an average false-negative rate of ~0.14%.

From Science Daily ● Oct. 1, 2026

There’s about a 5 percent false-negative rate, meaning falsely reassuring.

From Slate ● Dec. 4, 2025

According to Offit, mothers weren’t always screened, tests could produce false-negative results, and pregnant moms can contract the disease later in pregnancy.

From The Wall Street Journal ● Oct. 3, 2025

These tests are faster and less expensive than PCR tests, but there is an increased chance of false-negative results.

From Seattle Times ● Jan. 11, 2022

A false-negative result is a negative test result that should have been positive.

From Textbooks ● Apr. 25, 2013

In a small study on people with insomnia, when they were given a false negative sleep score, those individuals reported sleepiness and fatigue, as well as lower levels of alertness and clear thinking.

From Slate ● Aug. 11, 2026

It can take 10 to 15 minutes of scanning per slide, she says, to avoid giving a patient a false negative.

From The Wall Street Journal ● Aug. 5, 2026

Researchers stress that these Martian minerals do not represent a known false negative.

From Science Daily ● Jun. 30, 2026

It has been alleged that RT Diagnostics, which made £6.67m in three weeks, was set up in "shoddy and inadequate premises" in Halifax, West Yorkshire, and gave out false negative results to customers.

From BBC ● Feb. 6, 2026

For example, imaging showing a spot in the lung could be a false negative that may or may not progress to cancer.

From Seattle Times ● Jul. 10, 2023

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