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
Fiber slows the absorption of sugar into the bloodstream, while LAB can improve insulin sensitivity and reduce glucose absorption.
—Jillian Kubala, Health, 28 May 2026
The pneumonia then progressed to sepsis, and within hours caused disseminated intravascular coagulation, which is when small blood clots form in the bloodstream and block flow to organs, per Cleveland Clinic.
—Natasha Dye, PEOPLE, 27 May 2026
In rare cases, the infection can spread to the bloodstream and cause more severe illnesses.
—Anthony Thompson, USA Today, 26 May 2026
In 2019, the FDA released a study showing that certain molecules in chemical sunscreens—such as avobenzone, ecamsule, octocrylene and oxybenzone—may be absorbed into the bloodstream, calling for further investigation.
—Jackie Flynn Mogensen, Scientific American, 25 May 2026
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Jillian Kubala, Health, 28 May 2026
The pneumonia then progressed to sepsis, and within hours caused disseminated intravascular coagulation, which is when small blood clots form in the bloodstream and block flow to organs, per Cleveland Clinic.
—Natasha Dye, PEOPLE, 27 May 2026
In rare cases, the infection can spread to the bloodstream and cause more severe illnesses.
—Anthony Thompson, USA Today, 26 May 2026
In 2019, the FDA released a study showing that certain molecules in chemical sunscreens—such as avobenzone, ecamsule, octocrylene and oxybenzone—may be absorbed into the bloodstream, calling for further investigation.
—Jackie Flynn Mogensen, Scientific American, 25 May 2026
See All Example Sentences for bloodstream
Cite this Entry
“Bloodstream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bloodstream. Accessed 5 Jun. 2026.
Copy CitationKids Definition
bloodstream
noun
blood·stream
-ˌstrēm
: the flowing blood in a living thing with a circulatory system
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