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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

Root canal infections can allow bacteria to enter the bloodstream.

From Science Daily • Mar. 15, 2026

I could feel the drowsiness trickling through my bloodstream almost immediately.

From "Twilight" by Stephenie Meyer

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