blood plasma

noun

: the pale yellow fluid of whole blood that consists of water and its dissolved constituents including especially proteins (such as albumin, fibrinogen, and globulins)

Examples of blood plasma in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Astronauts start to urinate more, losing about 10–15% of their blood plasma within days. Kaif Shaikh, Interesting Engineering, 16 Oct. 2025 Roche’s Elecsys pTau181 test works by measuring the protein pTau181 in blood plasma; higher levels of this protein are associated with Alzheimer’s disease and other neurodegenerative diseases. Jacqueline Howard, CNN Money, 13 Oct. 2025 However, some products utilize exosomes derived from animal blood plasma. Victoria Moorhouse, Allure, 1 Oct. 2025 One is made from human blood plasma that has been screened and treated. Health, 21 Sep. 2025 See All Example Sentences for blood plasma

Word History

First Known Use

1842, in the meaning defined above

Time Traveler
The first known use of blood plasma was in 1842

Browse Nearby Words

Cite this Entry

“Blood plasma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blood%20plasma. Accessed 21 Oct. 2025.

Kids Definition

blood plasma

noun
: the fluid portion of whole blood

Medical Definition

blood plasma

noun
: the pale yellow fluid portion of whole blood that consists of water and its dissolved constituents including proteins (as albumin, fibrinogen, and globulins), electrolytes (as sodium and chloride), sugars (as glucose), lipids (as cholesterol and triglycerides), metabolic waste products (as urea), amino acids, hormones, and vitamins compare serum entry 1 sense a(1)

More from Merriam-Webster on blood plasma

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!