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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Many people are diagnosed with the disease during routine checkups and blood tests. —Tom Gavin, EverydayHealth.com, 27 Feb. 2026

Getting a blood test can minimize that risk. —Sohaib Imtiaz, Verywell Health, 27 Feb. 2026

The group, nowstacked with vaccine skeptics, voted in December to recommend that parents who vaccinate their infants against hepatitis B ask for a blood test after the first dose to see if the full shot regimen is needed. —Theresa Gaffney, STAT, 26 Feb. 2026

For example, the Shield test, the only blood test FDA-approved as a primary screening option for adults 45 and older at average risk that is also covered by Medicare, is helping patients screen for colon cancer by offering a more accessible, comfortable and less invasive method for screening. —Ernesto Fonts, Sun Sentinel, 24 Feb. 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)