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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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 group says that blood tests, especially for high-risk groups like Black men and those with a family history, could save lives. — Brittney Melton, NPR, 13 Nov. 2026

The screening involves a simple blood test, and men at average risk of getting prostate cancer should get that PSA test every two years between the ages of 50 and 69, the cancer society advised. — Lauran Neergaard, Chicago Tribune, 12 Nov. 2026

The screening involves a simple blood test, and men at average risk of getting prostate cancer should receive the prostate-specific antigen, or PSA, test every two years between the ages of 50 and 69, the cancer society advised. — CBS News, 12 Nov. 2026

Those at risk of low ferritin should ask for blood tests including a full blood count, a ferritin level check, and tests for levels of B12 and folate, Toby Richards, a surgeon and iron therapy specialist, told The Guardian. — Will Barker, TheWeek, 12 Nov. 2026

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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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