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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Increasing awareness can help diagnose sooner Diagnosis of Valley fever requires a blood test, one that is not included in routine lab work when a person goes to the emergency room or urgent care, Galgiani said. —Lauren De Young, The Arizona Republic, 15 Nov. 2024

A week beforehand, a routine blood test at 17 weeks into Kristin's pregnancy had come back with devastating results. —Cheyenne Haslett, ABC News, 3 Nov. 2024

In February 2018, the U.S. Food and Drug Administration approved the marketing of the nation's first-ever blood test to evaluate traumatic brain injury. —Pandora Dewan, Newsweek, 30 Oct. 2024

Specialized blood tests may be used to spot signs of conditions like colorectal cancer or an inflammatory bowel disease like ulcerative colitis (UC).22 Lower GI endoscopy: An endoscope is a tube-like tool with a tiny light and camera on the end. —Cristina Mutchler, Health, 19 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)