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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Kidney and liver function tests: These blood tests measure how well the liver and kidneys function. —Devineé Lingo, M.s., Health, 1 Nov. 2024

This approach would be especially compatible with diagnostics and tools such as blood tests that can be deployed in a simple setting. —Meeshanthini Dogan, Forbes, 30 Oct. 2024

The specialized blood tests, which were conducted by scientists at the US Centers for Disease Control and Prevention in Atlanta, looked for immune proteins called antibodies made in response to an infection. —Brenda Goodman, CNN, 24 Oct. 2024

Hypothyroidism is easily diagnosable with a blood test and treatable with medication to replace the hormone that your thyroid isn’t making on its own. —Katie Camero, SELF, 23 Oct. 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)