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

But the lawsuit states that Griego suffered an amniotic fluid embolism (AFE) during the delivery, meaning the fluid surrounding the fetus or fetal cells had entered her bloodstream, which can cause sudden heart-lung collapse and massive bleeding. — Alyssa Goldberg, USA Today, 24 Aug. 2026

Now, new research reveals this kind of high-intensity training provokes a remarkably robust response throughout the bloodstream. — Will Stone, NPR, 24 Aug. 2026

The fungus can cause everything from skin infections to life-threatening bloodstream infections. — Don Sweeney, Sacbee.com, 21 Aug. 2026

The Centers for Disease Control and Prevention explains that having too much blood sugar in the bloodstream will overwhelm our liver and muscles that normally store blood sugar and cause the insulin in our bodies to store any excess in other places. — Audrey Noble, Vogue, 20 Aug. 2026

Word History

First Known Use

13th century, in the meaning defined at sense 1

Rhymes for bloodstream

• abeam
• airstream
• daydream
• downstream
• esteem
• extreme
• grapheme
• hakim
• hornbeam
• lexeme
• mainstream
• midstream

Kids Definition

bloodstream

noun

blood·​stream -ˌstrēm 

: the flowing blood in a living thing with a circulatory system

Medical Definition

bloodstream

noun

blood·​stream -ˌstrēm 

: the flowing blood in a circulatory system