blood·stream | \ˈbləd-ˌstrēm \

Definition of bloodstream 

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

From the bloodstream, these particles can go anywhere in the body, leading to severe health concerns. Hannah Holzer, sacbee, "Air pollution increases risk for type 2 diabetes, study finds," 12 July 2018 If bacteria also infect the bloodstream (called septicemic plague) or the lungs (called pneumonic plague), organ failure and death can occur if it’s not treated right away. Amanda Macmillan,, "An Idaho Child Was Diagnosed With the Plague. How Worried Should You Be?," 13 June 2018 The idea is to deliver vitamins and nutrients directly into the bloodstream, which allows the body to immediately absorb the liquid, according to The Drip Room and sites such as Tim Johns, azcentral, "Scottsdale's The Drip Room provides trendy vitamin IV drips to customers," 9 May 2018 According to the Center for Disease Control & Prevention, sepsis happens after a pre-existing infection such as pneumonia or urinary tract infection worsens and spreads into the bloodstream, which quickly circulates the bacteria throughout the body. Daniela Sternitzky-di Napoli, Houston Chronicle, "Things you should know about George H.W. Bush's infection, aka sepsis," 24 Apr. 2018 Traditional drugs commonly take the form of pills, while biologics must be administered directly to the bloodstream, through infusions or injections. Sarah Gantz,, "Biologic drugs can be lifesavers. But their high cost can be life changing," 24 Apr. 2018 Another was a mutation in a gene responsible for the production of carbonic anhydrase, an enzyme that slows the build up of carbon dioxide in the bloodstream, a phenomenon that is associated with extreme diving. The Economist, "A group of people with an amphibious life have evolved traits to match," 21 Apr. 2018 Dutch, American and Malian scientists working in Ouélessébougou, Mali, found that adding methylene blue to a typical treatment regimen cleared gametocytes from the bloodstream within two days. Donald G. Mcneil Jr., New York Times, "Promising Malaria Drug Has a Striking Drawback: Blue Urine," 9 Feb. 2018 For that study, researchers assessed RNA in the bloodstream of pregnant women to determine the health and stage of their pregnancies. Jacqueline Howard, CNN, "Blood tests to predict preterm birth risk raise excitement -- and questions," 7 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bloodstream.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of bloodstream

13th century, in the meaning defined at sense 1

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Last Updated

24 Sep 2018

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Time Traveler for bloodstream

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

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More Definitions for bloodstream



English Language Learners Definition of bloodstream

: the flow of blood that moves through the heart and body


blood·stream | \ˈbləd-ˌstrēm \

Kids Definition of bloodstream

: the circulating blood in the body


blood·stream | \-ˌstrēm \

Medical Definition of bloodstream 

: the flowing blood in a circulatory system

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