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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Cleanups only happened at homes where kids’ blood tests came back as high or where yards contained nearly nine times the levels required to qualify for a cleanup in Omaha. —Chris Bowling, ProPublica, 15 Apr. 2026

Pujals Ronan also called into question the accuracy of a blood test Quigley was administered. —Aaron Parseghian, CBS News, 15 Apr. 2026

But a new, experimental blood test developed by researchers at Duke Health and the University of Minnesota might someday provide empirical clues — at least in the sense of short-term survival. —Scott Lafee, San Diego Union-Tribune, 14 Apr. 2026

The new Mass General Brigham study adds important evidence about the predictive potential of these kinds of blood tests. —Rick Sobey, Boston Herald, 14 Apr. 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)