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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Patients’ ketone levels are closely monitored with breath and blood tests, and their psychiatric medications are adjusted as needed. — Kelly Rogers Victor, USA Today, 6 Sep. 2026

The tests included dental examinations, the heart, lungs, and nervous system, as well as blood tests. — ABC News, 5 Sep. 2026

Yet, their blood tests stayed below the standard legal cutoff used to prove impairment at roadside traffic stops. — Khloe Quill, FOXNews.com, 3 Sep. 2026

Shedd said the deaths were unexpected and that necropsies, blood tests and additional examinations are underway. — Angelique Brenes, PEOPLE, 3 Sep. 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)