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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
Examples of bloodstream in a Sentence
The drug is now entering the bloodstream.
Recent Examples on the Web
This suggests that a medication that can increase serotonin in the gut, while not entering the bloodstream, may be a more effective treatment for anxiety and depression while also avoiding fetal exposure in women taking SSRIs.
—Kara Margolis, Chicago Tribune, 21 Jan. 2025
Even in forested areas, wildfires create a wide array of pollutants that can lodge deep in the lungs and enter the bloodstream, causing respiratory issues and other health problems.
—Keri Blakinger, Los Angeles Times, 18 Jan. 2025
Smoke from wildfires contains fine particles that can penetrate deep into the lungs and enter the bloodstream, increasing the risk of respiratory and cardiovascular diseases.
—Michael Gfoeller and David H. Rundell, Newsweek, 15 Jan. 2025
These tiny particles from vehicle emissions, industrial activity, and wildfires can penetrate deep into our lungs and enter the bloodstream, potentially causing lasting damage to multiple organs via oxidative stress.
—Bill Frist, Forbes, 15 Jan. 2025
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Word History
First Known Use
13th century, in the meaning defined at sense 1
Time Traveler
The first known use of bloodstream was
in the 13th century
Dictionary Entries Near bloodstream
Cite this Entry
“Bloodstream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bloodstream. Accessed 30 Jan. 2025.
Kids Definition
bloodstream
noun
blood·stream
-ˌstrēm
: the flowing blood in a living thing with a circulatory system
More from Merriam-Webster on bloodstream
Nglish: Translation of bloodstream for Spanish Speakers
Britannica English: Translation of bloodstream for Arabic Speakers
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