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 His team as well as others are working on new, more sophisticated formulations that would allow the drugs to be injected into the bloodstream and carried to the relevant part of the body—no 14-gauge needles involved. Fortune, "How mRNA vaccines like Moderna’s and Pfizer’s are propelling us into the ‘new golden age’ of vaccinology," 16 Apr. 2021 When the caffeine hit my bloodstream, Zeta-Jones had successfully transferred her aura directly into my brain. New York Times, "The Triumph of the Celebrity Endorsement," 14 Apr. 2021 Phillips, who was 22, died four days later after the silicone entered her bloodstream and became trapped in her lungs. NBC News, "Woman sentenced to 5 years for deadly butt injection," 3 Apr. 2021 Then your body absorbs the simple sugars, which make their way to your bloodstream. Julie Stewart, SELF, "What Are Carbohydrates Really, and Why Are They Important?," 25 Mar. 2021 In one of her videos, Grace also revealed that, in 2017, her heart stopped for two minutes and her organs began failing following a severe infection in her bloodstream. Piet Levy, Milwaukee Journal Sentinel, "Milwaukee singer Anna Grace gets rare four-chair turn with 'The Voice' blind audition," 15 Mar. 2021 The chemical seeps in through the fish’s gills and floods their bloodstream, triggering hypoglycemia and leaving them disoriented and defenseless. Katherine J. Wu, The Atlantic, "Cone Snails Are Liars and Murderers," 12 Mar. 2021 Koestline explains that chemical sunscreens—while invisible in application and easy to apply—can be known irritants, allergens, and can stay in your bloodstream for several days after use. Jessica Ourisman, Harper's BAZAAR, "Venus Williams On the Importance of Clean and Inclusive Sunscreen," 8 Mar. 2021 And even after the tumor was excised, an undetectable remnant in his bloodstream seeded metastatic lesions in his lungs. Michele Cohen Marill, Wired, "Could Fruit Flies Help Match Patients With Cancer Treatments?," 26 Feb. 2021

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.

See More

First Known Use of bloodstream

13th century, in the meaning defined at sense 1

Keep scrolling for more

Learn More about bloodstream

Time Traveler for bloodstream

Time Traveler

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

See more words from the same century

Statistics for bloodstream

Last Updated

1 May 2021

Cite this Entry

“Bloodstream.” Dictionary, Merriam-Webster, Accessed 9 May. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

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 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

Comments on bloodstream

What made you want to look up bloodstream? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Star Wars Words Quiz

  • cu jedi training
  • The bounty portion of bounty hunters (such as Boba Fett) comes from a Latin word meaning
True or False

Test your knowledge - and maybe learn something along the way.


Anagram puzzles meet word search.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!