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.
Both are preventative monoclonal antibodies, which deliver antibodies directly into the bloodstream to provide immediate protection. Annika Kim Constantino, CNBC, 9 June 2025 From fast fashion’s environmental footprint to microplastics found in human bloodstreams, the crisis is undeniable. Dianne Plummer, Forbes.com, 4 June 2025 Fiber is also linked to lower rates of heart disease, possibly reducing the amount of cholesterol that is absorbed from our diets into our bloodstream. Akshay Syal, NBC news, 31 May 2025 Although she once was hooked up 24 hours a day to the feeding system that delivered nutrients directly into the bloodstream, doctors began weaning her off as her intestines got stronger. Andrea Castillo, Los Angeles Times, 27 May 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 19 Jun. 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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