blood serum

noun

: the clear yellowish fluid that remains from blood plasma after clotting factors (such as fibrinogen and prothrombin) have been removed by clot formation

Examples of blood serum in a Sentence

Recent Examples on the Web
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In the study, the U.K. researchers exposed colon cancer cells to human blood serum collected immediately after exercise, finding that the cells repaired DNA damage faster and showed gene activity patterns linked to slower growth. Kelly McGreal, FOXNews.com, 8 Jan. 2026 The roles of smoking and THC A separate analysis added blood serum from cannabis smokers and edible users to commercially purchased cultures of endothelial cell in the laboratory. Sandee Lamotte, CNN Money, 28 May 2025 Every test pointed towards a perfect match: blood type, tissue type, and a blood serum antibody crossmatch that indicated Richard’s body would accept one of Ed’s kidneys. Allan Chernoff, Hartford Courant, 16 Jan. 2025 Our group is currently working on using blood serum to identify proteins that could be involved with breast cancer. Danielle Whitham, Discover Magazine, 22 Mar. 2024 See All Example Sentences for blood serum

Word History

First Known Use

1801, in the meaning defined above

Time Traveler
The first known use of blood serum was in 1801

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Cite this Entry

“Blood serum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blood%20serum. Accessed 4 Feb. 2026.

Kids Definition

blood serum

noun
: blood plasma from which certain substances (as fibrinogen) involved in the clotting of blood have been removed

Medical Definition

blood serum

noun

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