bloodstream
noun
blood·stream
ˈbləd-ˌstrēm 
1
: the flowing blood in a circulatory system
2
: a mainstream of power or vitality
introduce into the economic bloodstream a large amount of money—
Harper's
Harper'sExamples of bloodstream in a Sentence
The drug is now entering the bloodstream.
Recent Examples on the Web
As bones break down, calcium, a mineral that helps maintain bone and tooth health, is released into the bloodstream.
—Lindsay Curtis, Health, 14 Sep. 2025
These particles are small enough to enter the bloodstream when inhaled, which can cause inflammation and neurological damage.
—Thomas Westerholm, MSNBC Newsweek, 12 Sep. 2025
Multiple studies have found that drivers with THC, the primary psychoactive compound in cannabis, in their bloodstream are about twice as likely to be involved in a fatal crash – either as the cause or as a victim – compared with those who haven’t used drugs or alcohol.
—Andrew Yockey, The Conversation, 11 Sep. 2025
Even short periods of convalescence, from one to three days, increase the likelihood of a condition called deep venous thrombosis, which can cause clots to break loose in the extremities and travel through the bloodstream, passing through the heart and lodging in the lungs.
—Paul Sisson, Mercury News, 8 Sep. 2025
See All Example Sentences for bloodstream
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Lindsay Curtis, Health, 14 Sep. 2025
These particles are small enough to enter the bloodstream when inhaled, which can cause inflammation and neurological damage.
—Thomas Westerholm, MSNBC Newsweek, 12 Sep. 2025
Multiple studies have found that drivers with THC, the primary psychoactive compound in cannabis, in their bloodstream are about twice as likely to be involved in a fatal crash – either as the cause or as a victim – compared with those who haven’t used drugs or alcohol.
—Andrew Yockey, The Conversation, 11 Sep. 2025
Even short periods of convalescence, from one to three days, increase the likelihood of a condition called deep venous thrombosis, which can cause clots to break loose in the extremities and travel through the bloodstream, passing through the heart and lodging in the lungs.
—Paul Sisson, Mercury News, 8 Sep. 2025
See All Example Sentences for bloodstream
Cite this Entry
“Bloodstream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bloodstream. Accessed 18 Sep. 2025.
Copy CitationKids Definition
bloodstream
noun
blood·stream
-ˌstrēm
: the flowing blood in a living thing with a circulatory system
Love words? Need even more definitions?
Merriam-Webster unabridged
Share