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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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

According to the affidavit, Avalos allegedly refused a blood test, requiring a warrant to be issued to collect a blood sample. —Timia Cobb, Dallas Morning News, 5 Feb. 2026

Students tested for tuberculosis (TB) Suffolk's health department recommended all parents receiving the letter have their kids undergo a Mantoux PPD skin test or Quantiferon blood test for the bacteria that causes tuberculosis (TB). —Mark Prussin, CBS News, 5 Feb. 2026

Hims and Hers offers diagnostic testing, hormonal treatments, and cancer detecting blood tests. —Jacqueline Munis, Fortune, 1 Feb. 2026

The team predicts that, within five years, blood tests for early Parkinson’s diagnoses could become more common within clinical practice. —Angelica Stabile, FOXNews.com, 31 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: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of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)