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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Sometimes, brain imaging or blood tests are needed to rule out another health issue. —Katherine Cobb-Pitstick, The Conversation, 1 Dec. 2025

Notably, only oxylipin levels in the liver, not the blood, were linked with body weight, indicating that standard blood tests may not reflect early metabolic changes due to diet. —Hollie Silverman, MSNBC Newsweek, 30 Nov. 2025

In addition to the fundraising endeavor, Van Der Beek also leant his voice to promoting the Shield Cancer Screen blood test, which helps detect colorectal cancer. —Rachel McRady, PEOPLE, 25 Nov. 2025

Her lawyers had earlier claimed that her health was deteriorating, and Peters underwent blood tests and a chest X-ray to check for lung cancer earlier this month. —Seth Klamann, Denver Post, 25 Nov. 2025

Word History

First Known Use

1851, in the meaning defined above

Rhymes for blood test

• abreast
• accessed
• addressed
• appressed
• armrest
• arrest
• assessed
• attest
• backrest
• behest
• bequest
• caressed

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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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