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 …—
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Harper'sExamples of bloodstream in a Sentence
The drug is now entering the bloodstream.
Recent Examples on the Web
In both studies, the prediabetic participants were coached to make appropriate lifestyle changes to lower blood sugar (the amount of glucose in the bloodstream) through diet and exercise, also targeting weight loss.
—Angelica Stabile, FOXNews.com, 18 Dec. 2025
The levels of immunosuppression drugs in your bloodstream must be kept within a narrow window.
—Sara Hoffman, Verywell Health, 16 Dec. 2025
The film entered the bloodstream of American cinema and never left.
—Clayton Davis, Variety, 15 Dec. 2025
IgE levels in that fluid correspond to those in the bloodstream.
—New Atlas, 12 Dec. 2025
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Angelica Stabile, FOXNews.com, 18 Dec. 2025
The levels of immunosuppression drugs in your bloodstream must be kept within a narrow window.
—Sara Hoffman, Verywell Health, 16 Dec. 2025
The film entered the bloodstream of American cinema and never left.
—Clayton Davis, Variety, 15 Dec. 2025
IgE levels in that fluid correspond to those in the bloodstream.
—New Atlas, 12 Dec. 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 24 Dec. 2025.
Copy CitationKids Definition
bloodstream
noun
blood·stream
-ˌstrēm
: the flowing blood in a living thing with a circulatory system
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