blood test

noun

: a test of the blood
specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of a particular disease or medical condition (such as diabetes, cardiovascular disease, or cancer) or serve to indicate the degree of function of a specific organ (such as the liver or kidney)

Examples of blood test in a Sentence

He had a blood test, and the doctor who did it said his cholesterol was too high.
Recent Examples on the Web The teen’s blood test came back positive for cannabis, according to a crash investigation report that was updated this month. Nicole Lopez, Fort Worth Star-Telegram, 28 Mar. 2024 The exact type of test depends on the potential infection: For most viral infections, including HIV, a blood test is necessary, but for most bacterial infections or viral infections that can cause lesions—for instance, herpes—either a urine test or a swab of the affected area can be used. Mara Santilli, SELF, 26 Mar. 2024 The hope is, once approved by the US Food and Drug Administration, this blood test would increase screening for colorectal cancer. Dr. Jamin Brahmbhatt, CNN, 18 Mar. 2024 Still, neither the stool nor blood test will replace the colonoscopy for high-risk populations, such as those with inflammatory bowel disease, Imperiale said. Binghui Huang, The Indianapolis Star, 18 Mar. 2024 But something much simpler is on the horizon: a blood test. Gina Kolata, New York Times, 13 Mar. 2024 Guardant’s blood test works by detecting DNA released by cancerous tumors. Erika Edwards, NBC News, 13 Mar. 2024 The sites' prices for TRT range from $120 to $135 a month, not including initial mail-back blood tests for around $60. Michael Scaturro, CBS News, 16 Mar. 2024 Are those developments enough to warrant the possibility of diagnosing healthy people with an irreversible disease, based on a blood test detecting amyloid? Paula Span, New York Times, 4 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'blood test.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1851, in the meaning defined above

Time Traveler
The first known use of blood test was in 1851

Dictionary Entries Near blood test

Cite this Entry

“Blood test.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blood%20test. Accessed 16 Apr. 2024.

Kids Definition

blood test

noun
: a test of the blood (as to detect the presence of disease-causing agents or determine the number of blood cells)

Medical Definition

blood test

noun
: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of a particular disease or medical condition (as diabetes, cardiovascular disease, or cancer) or serve to indicate the degree of function of a specific organ (as the liver or kidney)

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