blood·​stream | \ ˈbləd-ˌstrēm How to pronounce bloodstream (audio) \

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 As the day winds down, so do our bodies; insulin levels drop and glucose is left in the bloodstream to be turned into fat. Diane Bellcolumnist, San Diego Union-Tribune, 17 May 2022 These are immune cells that act as lookouts, keeping an eye out for any microbes in the bloodstream, and also serve as early responders to infection. William A. Haseltine, Forbes, 21 Apr. 2022 But a drug test must accompany a physical examination as well, as THC, the psychoactive ingredient in marijuana, can stay in the bloodstream for weeks. From Usa Today Network And Wire Reports, USA TODAY, 18 Apr. 2022 Vethaak’s discovery of microplastics in the bloodstream and Kannan’s work showing that infants might be among those most often exposed. NBC News, 11 Apr. 2022 Nitrous oxide quickly dissolves in the bloodstream and affects the brain within seconds, providing users with a fast dose of euphoria. Elissa Welle, Detroit Free Press, 27 Mar. 2022 Golden and bald eagles that scavenge the remains of animals hunted and killed by lead shot are poisoned when lead accumulates in the bloodstream over time. Lilly Price,, 28 Feb. 2022 Next comes the small intestine, which further digests your food, and helps absorb nutrients and vitamins into your bloodstream. Kathryn Watson, SELF, 24 Mar. 2022 No pig viruses were transmitted to the recipient, and no pig cells were found in his bloodstream. Lauran Neergaard, ajc, 20 Jan. 2022 See More

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.

First Known Use of bloodstream

13th century, in the meaning defined at sense 1

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

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Last Updated

25 May 2022

Cite this Entry

“Bloodstream.” Dictionary, Merriam-Webster, Accessed 28 May. 2022.

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More Definitions for bloodstream


blood·​stream | \ ˈbləd-ˌstrēm How to pronounce bloodstream (audio) \

Kids Definition of bloodstream

: the circulating blood in the body


blood·​stream | \ -ˌstrēm How to pronounce bloodstream (audio) \

Medical Definition of bloodstream

: the flowing blood in a circulatory system

More from Merriam-Webster on bloodstream

Nglish: Translation of bloodstream for Spanish Speakers

Britannica English: Translation of bloodstream for Arabic Speakers


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