bloodstream

noun

blood·​stream ˈbləd-ˌstrēm How to pronounce bloodstream (audio)
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
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.
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 See all Example Sentences for bloodstream 

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 How to pronounce bloodstream (audio)
: the flowing blood in a living thing with a circulatory system

Medical Definition

bloodstream

noun
blood·​stream -ˌstrēm How to pronounce bloodstream (audio)
: the flowing blood in a circulatory system

More from Merriam-Webster on bloodstream

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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