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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Laboratory tests are critical for confirming systemic mastocytosis, including: Tryptase level test: This blood test measures the level of tryptase, a protein mast cells produce. —Sarah Jividen, Verywell Health, 15 July 2024

Paz-Bailey says the blood test is available at public health labs and a few commercial labs. —Alice Park, TIME, 15 July 2024

The medical center on their home island did only basic blood tests. —Raymond Zhong, New York Times, 26 June 2024

Ten people saw their cognition actually improve, while a blood test found levels of amyloid, a hallmark of Alzheimer’s disease, were retreating, said lead study author Dr. Dean Ornish, a clinical professor of medicine at the University of California, San Francisco. —Sandee Lamotte, CNN, 18 June 2024

Word History

First Known Use

1851, in the meaning defined above

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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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