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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

These appointments may include physical exams, imaging tests, blood tests, and treatments. —Carrie Madormo, Health, 2 Aug. 2025

In the 2024 study, a blood test called plasma Aβ42/40 showed a significant improvement in the original intervention group. —Sandee Lamotte, CNN Money, 29 July 2025

Scientists at Johns Hopkins University found that a blood test could detect cancer DNA more than three years before a patient receives a clinical diagnosis. —Sara Hashemi, Smithsonian Magazine, 24 July 2025

Existing diagnostic approaches involve intravenous blood tests and laboratory analyses alongside imaging studies and extensive patient history collection. —Health Reporter, MSNBC Newsweek, 24 July 2025

Word History

First Known Use

1851, in the meaning defined above

Rhymes for blood test

• abreast
• accessed
• addressed
• appressed
• armrest
• arrest
• assessed
• attest
• backrest
• behest
• bequest
• caressed

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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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