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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Macias said Scott Anderson had two to three drinks and that Disney did an incomplete and slipshod investigation, with no Breathalyzer or blood tests and no videos of Anderson’s behavior that night. —Christopher Goffard, Los Angeles Times, 4 Sep. 2024

This can include urine tests, blood tests, imaging tests, breathing tests and even biopsies of your nerves. —Bruce Y. Lee, Forbes, 16 Aug. 2024

One study funded by the Cancer Moonshot is researching cancer detection blood tests as a less invasive tool for early detection of cancer. —Paulina Smolinski, CBS News, 13 Aug. 2024

Your healthcare provider may also perform a blood test called the GFR (glomerular filtration rate). —Jillian Kubala, Health, 12 Aug. 2024

Word History

First Known Use

1851, in the meaning defined above

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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)