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 money …Harper'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.
In 2021, the former president was hospitalized for a urinary tract infection that spread to his bloodstream. Emma Bussey, FOXNews.com, 2 Nov. 2025 Soluble Fiber Makes Kiwi a Low-Glycemic-Index Food The soluble fiber in kiwi helps slow digestion and control how quickly sugar gets absorbed into the bloodstream, said Charlize Del Rosario, RD, CNSC, a dietitian at USC Verdugo Hills Hospital, part of Keck Medicine of USC. Maggie O'Neill, Verywell Health, 28 Oct. 2025 Certain nutrients, namely fiber and protein, support healthy blood sugar management by slowing digestion and the release of sugar into the bloodstream. Jillian Kubala, Health, 28 Oct. 2025 Both infiltrate your team’s bloodstream, becoming its culture, and the losing habits are like cancer. Omar Kelly, Miami Herald, 28 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

Browse Nearby Words

Cite this Entry

“Bloodstream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bloodstream. Accessed 10 Nov. 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: - Definition revised
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