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bloodstream

American

[bluhd-streem] / ˈblʌdˌstrim /

noun

the blood flowing through a circulatory system.

bloodstream British

/ ˈblʌdˌstriːm /

noun

the flow of blood through the vessels of a living body

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of bloodstream

First recorded in 1870–75; blood + stream

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Some monitors there recorded levels of PM2.5 -- particles small enough to enter the bloodstream and linked to diseases like cancer -- of over 900 micrograms per cubic metre.

From Barron's • Apr. 3, 2026

However, if left untreated, it can become far more serious if the bacteria spreads to the organs, bloodstream or bones.

From BBC • Mar. 28, 2026

Burning them releases carbon monoxide, nitrogen oxides and fine particles that penetrate the lungs and bloodstream.

From BBC • Mar. 19, 2026

This infection can allow bacteria from the tooth to enter the bloodstream, triggering inflammation.

From Science Daily • Mar. 15, 2026

The mosaic thickens and throws more clots, and the clots drift through the bloodstream into the small capillaries, where they get stuck.

From "The Hot Zone" by Richard Preston

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023