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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

The physician would examine the rectum and feel the prostate for any lumps, bumps, or firmness, coupled with a blood test. —Taayoo Murray, Essence, 7 June 2024

Grail, which makes a diagnostic blood test that screens for 50 types of cancer, was founded in 2015 as a spinoff firm of Illumina. —Natallie Rocha, San Diego Union-Tribune, 4 June 2024

The most common form of prostate cancer screening is the PSA blood test, Haywood said. —Brian Mastroianni, Health, 4 June 2024

The state of Arizona sued Theranos in 2017 for customer refunds for blood tests. —Jessica Sager, Peoplemag, 8 May 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)