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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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 goal is to create a blood test that can be used to cut down on time trying to find ovarian cancer so doctors can treat it faster. —Helen Carefoot, Flow Space, 8 Sep. 2025

After around four-and-a-half years, 55 participants (63% of the original group) came back for checks that included DEXA body scans, blood tests, blood pressure measurements, diet and activity questionnaires, and stool samples for gut microbiome analysis. —New Atlas, 7 Sep. 2025

The other one typically used is a CA-125 blood test, which measures the amount of a protein called CA-125 in your blood. —Erica Sloan, SELF, 5 Sep. 2025

The study also found that two-thirds of people who were suspected to have heart failure were found to not have the condition after a further blood test or heart scan. —Angelica Stabile, FOXNews.com, 4 Sep. 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)