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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Gjoni says blood test results are often the first clues of disease, even before symptoms show up. — Helen Carefoot, Flow Space, 14 July 2026

The study says that reliance on a positive blood test without careful consideration of clinical symptoms may lead to overdiagnosis of the condition, which is managed solely through food avoidance. — Sophie Lindberg, Kansas City Star, 10 July 2026

Full-body MRIs, multi-omics blood tests, continuous glucose monitors, wearable health trackers and advanced biomarker panels are seemingly everywhere. — Felicity Yost, Forbes.com, 10 July 2026

Maybe there will be liquid biopsies (specialized blood tests) or even cheek swabs that can detect breast cancer. — Tara Thomas, Glamour, 10 July 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)