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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

Your ob-gyn may also send you for a blood test to assess HCG levels, which can give them more insight into whether the pregnancy is developing as expected or if there is something of concern that warrants further testing. —Lisa McCarty, SELF, 21 May 2025

The simple blood test was found to be up to 96 percent accurate in identifying elevated levels of beta amyloid and up to 97 percent accurate in identifying p-tau217, the report stated. —Lauryn Higgins, Flow Space, 21 May 2025

Since the 1990s, men have been able to get a blood test to check for levels of a protein called prostate-specific antigen, or PSA, that might indicate the presence of prostate cancer. —Brenda Goodman, CNN Money, 20 May 2025

Most cases of prostate cancer are diagnosed at an early stage, often with the help of routine screenings involving blood tests or rectal exams. —Aria Bendix, NBC news, 19 May 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)