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 Slowing production and falling revenues for American companies will trickle into the thinning bloodstream of transportation. John Branch,, "Alone on the road, a trucker’s long haul as America fights the virus," 28 Mar. 2020 Early data from China on a small sample of 183 patients also showed that more than 70% of patients who died from COVID-19 had small clots develop throughout their bloodstream. Author: Ariana Eunjung Cha, Anchorage Daily News, "A mysterious blood-clotting complication is killing coronavirus patients," 22 Apr. 2020 Salt glands around their eyes allow them to secrete excess salt from their bloodstream. National Geographic, "Diamondback terrapin," 26 Mar. 2020 Some survivors of the West Africa outbreak appeared to shed the Ebola virus from their bloodstream, but small amounts remained in other bodily fluids. Los Angeles Times, "Q&A: A health official says Ebola has been ‘cured.’ Here’s why that’s not really the case," 16 Aug. 2019 The majority of Florida hospitals — 116 — were at the national standard for MRSA bloodstream infections. Daniel Chang, miamiherald, "Patients got more MRSA infections at Jackson Health than at any other U.S hospital," 4 June 2018 Studies have found that the more bile acids build up in the bloodstream, the higher the risk of stillbirth. Christina Caron, New York Times, "Itching During Pregnancy? It Might Signal a Bigger Problem.," 17 Apr. 2020 In one report, researchers in China said 7 out of 10 patients who died of Covid-19 had small blood clots throughout the bloodstream, compared to fewer than 1 in 100 people who survived. Elizabeth Cooney, STAT, "Blood clots in severe Covid-19 patients leave clinicians with clues about the illness — but no proven treatments," 16 Apr. 2020 Their spleen stores RBCs, and the researchers found that to eject more into the bloodstream, the organ contracts to weigh 41 percent less. Priyanka Runwal, Scientific American, "Antarctic Fish Is a Blood Doping Champion," 30 Mar. 2020

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

20 May 2020

Cite this Entry

“Bloodstream.” Dictionary, Merriam-Webster, Accessed 29 May. 2020.

Keep scrolling for more

More Definitions for bloodstream


How to pronounce bloodstream (audio)

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

Keep scrolling for more

More from Merriam-Webster on bloodstream

Rhyming Dictionary: Words that rhyme with bloodstream

Spanish Central: Translation of 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).


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

May 2020 Words of the Day Quiz

  • a blooming wisteria tree
  • Which is a synonym of exiguous?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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