bloodstream

noun

blood·​stream ˈbləd-ˌstrēm How to pronounce bloodstream (audio)
1
: the flowing blood in a circulatory system
2
: a mainstream of power or vitality
introduce into the economic bloodstream a large amount of moneyHarper's

Examples of bloodstream in a Sentence

The drug is now entering the bloodstream.
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.
This means less cholesterol is absorbed into the bloodstream. Maggie O'Neill, Verywell Health, 17 Oct. 2025 Over the past decade, this unassuming budget wonk and self-proclaimed Christian nationalist has quietly injected his ideas into the bloodstream of American politics. Lisa Riordan Seville, ProPublica, 17 Oct. 2025 Patients with pneumonia might face complications, including sepsis or bacteria in the bloodstream, difficulty breathing, fluid around the lungs and abscesses in the lungs. Rebecca Cohen, NBC news, 16 Oct. 2025 Salmonella infection may spread from the intestines to the bloodstream and then to other parts of the body. Matthew Robinson, MSNBC Newsweek, 16 Oct. 2025 See All Example Sentences for bloodstream

Word History

First Known Use

13th century, in the meaning defined at sense 1

Time Traveler
The first known use of bloodstream was in the 13th century

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Cite this Entry

“Bloodstream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bloodstream. Accessed 25 Oct. 2025.

Kids Definition

bloodstream

noun
blood·​stream -ˌstrēm How to pronounce bloodstream (audio)
: the flowing blood in a living thing with a circulatory system

Medical Definition

bloodstream

noun
blood·​stream -ˌstrēm How to pronounce bloodstream (audio)
: the flowing blood in a circulatory system

More from Merriam-Webster on bloodstream

Last Updated: - Updated example sentences
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