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.
Gentle massage of the lymph node clusters at the neck and collarbone can help clear stagnant fluid, since the thoracic duct returns the majority of the body’s lymph to the bloodstream right at the collarbone. Allison Palmer, Charlotte Observer, 29 June 2026 Gentle massage of the node clusters at the neck and collarbone helps move stagnant fluid toward the thoracic duct, the body’s largest lymph vessel, which returns the majority of lymph to the bloodstream right at the collarbone. Allison Palmer, Kansas City Star, 29 June 2026 The lymphatic system collects that fluid from your tissues, filters it and returns it to your bloodstream. Allison Palmer, Sacbee.com, 29 June 2026 The same immigrant nerve and faith put a fisherman’s son in center field and put a Scotsman’s telephone and a Serb’s alternating current and a Russian Jew’s television into the bloodstream of the country. Anthony Scaramucci, Fortune, 28 June 2026 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 2 Jul. 2026.

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

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