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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Only a few states test for cannabis impairment in drivers when involved in serious accidents, and blood tests aren’t able to assess whether cannabis was used hours or days before, making cannabis impairment challenging to determine. —Dario Sabaghi, Forbes, 19 Mar. 2025

The conclusions are based on animal models and blood tests that measure the immune response. —Will Stone, NPR, 19 Mar. 2025

After the flight landed a couple hours later, Emily was taken to the airport clinic for three hours and then transported to Rashid Hospital in Dubai where scans and blood tests were done to diagnose her. —Vanessa Etienne, People.com, 13 Mar. 2025

What To Know Doctors at Gemelli Hospital said Francis had shown signs of improvement in recent days, with blood tests confirming a positive response to treatment. —Faisal Kutty, Newsweek, 11 Mar. 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)