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specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable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)
Example Sentences
He had a blood test, and the doctor who did it said his cholesterol was too high.
Recent Examples on the Web There is no blood test that can reliably detect whether you’re fully vaccinated against polio. 
Deblina Chakraborty, CNN, 15 Sep. 2022 While there is no blood test to detect collagen levels, this decline can become apparent with skin wrinkles due to loss of elasticity, stiffer joints, gut or digestive issues as well as longer recovery time after injury. Dr. Michael Daignault, USA TODAY, 1 Sep. 2022 In other words, testosterone therapy caused no changes in heart disease or diabetes risk, and no change in my prostate gland or PSA score, a blood test used primarily to screen for prostate cancer. Bryant Stamford, The Courier-Journal, 30 June 2022 To further complicate things, a positive Lyme disease test also isn’t proof of an active infection (one that is present during the time of the blood test). Carley Millhone, SELF, 17 June 2022 There was no blood test at that time to determine if a person carried the Huntington's gene. Dana Hunsinger Benbow, The Indianapolis Star, 23 May 2022 When a patient presents with the symptoms of myotonic dystrophy type 2, the first step in confirming a diagnosis might be a blood test. Maggie O'neill, Health.com, 15 Apr. 2022 There were no signs of impairment, Los Angeles County sheriff's deputies at the scene said, although a blood test was never taken. NBC News, 11 Apr. 2022 Researchers can collect a biological sample (say, a blood test) in a test tube and pour in a solution containing the gold nanoparticles. Melina Walling, The Arizona Republic, 15 Feb. 2022 See More
Deblina Chakraborty, CNN, 15 Sep. 2022 While there is no blood test to detect collagen levels, this decline can become apparent with skin wrinkles due to loss of elasticity, stiffer joints, gut or digestive issues as well as longer recovery time after injury. Dr. Michael Daignault, USA TODAY, 1 Sep. 2022 In other words, testosterone therapy caused no changes in heart disease or diabetes risk, and no change in my prostate gland or PSA score, a blood test used primarily to screen for prostate cancer. Bryant Stamford, The Courier-Journal, 30 June 2022 To further complicate things, a positive Lyme disease test also isn’t proof of an active infection (one that is present during the time of the blood test). Carley Millhone, SELF, 17 June 2022 There was no blood test at that time to determine if a person carried the Huntington's gene. Dana Hunsinger Benbow, The Indianapolis Star, 23 May 2022 When a patient presents with the symptoms of myotonic dystrophy type 2, the first step in confirming a diagnosis might be a blood test. Maggie O'neill, Health.com, 15 Apr. 2022 There were no signs of impairment, Los Angeles County sheriff's deputies at the scene said, although a blood test was never taken. NBC News, 11 Apr. 2022 Researchers can collect a biological sample (say, a blood test) in a test tube and pour in a solution containing the gold nanoparticles. Melina Walling, The Arizona Republic, 15 Feb. 2022 See More Word History
First Known Use
1851, in the meaning defined above
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)