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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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 tests that can confirm an IgA nephropathy diagnosis are a urine test, blood test, and liver biopsy. —Suchandrima Bhowmik, Health, 13 Jan. 2026

Searching for answers, the couple ordered at-home blood tests from Fertilysis and sent their samples in for analysis. —Ashley Vega, PEOPLE, 12 Jan. 2026

Key Takeaways Complement 3 glomerulopathy (C3G) is diagnosed with a combination of a clinical evaluation, blood tests, urine tests, and a renal (kidney) biopsy. —Md Published, Verywell Health, 12 Jan. 2026

The Australian dates come after a turbulent end to 2025, when he was forced to cancel several shows following medical advice related to vocal and blood tests. —Jessica Lynch, Billboard, 10 Jan. 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)