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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

In addition to the drugs, blood tests revealed that the comedian had taken the antidepressant Prozac and an antihistamine — but neither of those had contributed to his death, according to the Los Angeles Times. —Lynsey Eidell, People.com, 18 Dec. 2024

This boosts your aerobic metabolism, and helps explain why the blood tests also showed that resting lactate levels dropped by 15 percent after the breath-holds. —Alex Hutchinson, Outside Online, 16 Dec. 2024

There were just 412 blood tests done in 2020 and none in 2021. —Maury Brown, Forbes, 10 Dec. 2024

Wojnarowski had a physical in February, when his blood tests revealed an elevated level of PSA, or prostate-specific antigen, according to SI. —Gabriella Rudy, NBC News, 5 Dec. 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)