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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Oncologist Arif Kamal, chief patient officer at the American Cancer Society, says Grail is one of hundreds of companies pursuing the promise of blood tests — competing over levels of sensitivity, accuracy, and reliability. —Yuki Noguchi, NPR, 22 June 2026

Now, she's partnered with Guardant Health, advocating for their Shield™ blood test, which screens for colorectal cancer with just a blood draw. —Shay Martin, PEOPLE, 21 June 2026

Crystal was formally diagnosed in 2023, through an immunoglobulin-E-antibodies blood test. —CBS News, 19 June 2026

However, research shows symptoms can appear even before anemia develops on blood tests. —Sara Hoffman, Verywell Health, 18 June 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)