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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

In addition, there are specialized brain scans and blood tests that can further pinpoint the neurocognitive diagnoses with considerable accuracy. —Anand Kumar, STAT, 25 June 2024

Health This blood test screens for multiple cancers at once The president identified developing MCED tests as a priority for the Cancer Moonshot. —Big Think, 24 June 2024

As part of the trial, Nicholls underwent a battery of tests, including a unique blood test that can track levels of amyloid, tau and other hallmark biomarkers for Alzheimer’s disease and other degenerative conditions. —Sandee Lamotte, CNN, 18 June 2024

The year is 1985, and a blood test for H.I.V. has recently become available. —Jerome Groopman, The New Yorker, 17 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)