bloodstream
noun
blood·stream
ˈbləd-ˌstrēm 
1
: the flowing blood in a circulatory system
2
: a mainstream of power or vitality
introduce into the economic bloodstream a large amount of money—
Harper's
Harper'sExamples of bloodstream in a Sentence
The drug is now entering the bloodstream.
Recent Examples on the Web
These are microscopic vessels where oxygen and nutrients leave the bloodstream to feed the tissues, and carbon dioxide (a metabolic waste product) moves in.
—Bryant Stamford, Louisville Courier Journal, 2 Oct. 2025
By binding to cholesterol in the small intestine, cholesterol is not absorbed into the bloodstream and is instead excreted from the body.
—Jennifer Moll, Verywell Health, 2 Oct. 2025
During sleep, electrical waves deep in the brain push fluid around cells to the surface, where waste goes into the bloodstream and then on to the liver and kidneys for removal.
—Arianna Huffington, Time, 1 Oct. 2025
That fluid lives inside your cells, between them and in the bloodstream.
—Dr. Jamin Brahmbhatt, CNN Money, 30 Sep. 2025
See All Example Sentences for bloodstream
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Bryant Stamford, Louisville Courier Journal, 2 Oct. 2025
By binding to cholesterol in the small intestine, cholesterol is not absorbed into the bloodstream and is instead excreted from the body.
—Jennifer Moll, Verywell Health, 2 Oct. 2025
During sleep, electrical waves deep in the brain push fluid around cells to the surface, where waste goes into the bloodstream and then on to the liver and kidneys for removal.
—Arianna Huffington, Time, 1 Oct. 2025
That fluid lives inside your cells, between them and in the bloodstream.
—Dr. Jamin Brahmbhatt, CNN Money, 30 Sep. 2025
See All Example Sentences for bloodstream
Cite this Entry
“Bloodstream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bloodstream. Accessed 7 Oct. 2025.
Copy CitationKids Definition
bloodstream
noun
blood·stream
-ˌstrēm
: the flowing blood in a living thing with a circulatory system
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