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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

This included my Natera testing — a blood test that screens for risk of passing on genetic conditions, strongly advised by my doctor — which was advertised as $250, but resulted in a bill exceeding $700. — Pooja Yerramilli, STAT, 28 Oct. 2026

Much like a human hospital, the donkey facility has ultrasound and X-ray technology along with a full pharmacy and equipment to run blood tests. — Brayden Garcia october 28, Fort Worth Star-Telegram, 28 Oct. 2026

Standard blood tests that count how many red blood cells a person has won’t catch iron deficiency that has not progressed into anemia. — Amanda Schupak, CNN Money, 23 Oct. 2026

The team at the University of California, San Francisco, who conducted the study, used blood tests to measure five different signaling molecules involved in inflammation in participants, both before and after two sessions with psilocybin. — Will Stone, NPR, 21 Oct. 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)