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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

All of a sudden, a rag tag group of guys that can’t figure out how to do a blood test, now have to save the planet. —Mike Fleming Jr, Deadline, 8 Apr. 2025

It can be diagnosed with a blood test soon after exposure. —Vanessa Etienne, People.com, 4 Apr. 2025

Looking beyond amyloid The blood test is the result of a search for better Alzheimer's biomarkers — measurable substances in the body that indicate the presence of a disease. —Jon Hamilton, NPR, 2 Apr. 2025

Doctors can make a definitive diagnosis with a blood test or by swabbing a patients’ nose or throat. —Liz Szabo, NBC news, 29 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)