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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Additional blood tests related to a thyroid condition, medication and other treatments pushed the overall cost of a single cycle close to $20,000, leaving little room for multiple attempts. —Tereza Shkurtaj, PEOPLE, 7 June 2026

Jabbing pain and constant malaise followed him for years, but regular blood tests always came back normal — until one day a specialist thought to ask something new. —Rachel Zimmerman, Washington Post, 6 June 2026

These charges could change based on the results of the blood tests and additional information that is garnered through the investigation. —Olivia Young, CBS News, 3 June 2026

Information encoded in vocal systems could reveal useful details about stress levels that could help improve the welfare of farm and lab animals without invasive procedures such as blood tests. —Katie Hunt, CNN Money, 3 June 2026

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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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