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

The same immigrant nerve and faith put a fisherman’s son in center field and put a Scotsman’s telephone and a Serb’s alternating current and a Russian Jew’s television into the bloodstream of the country. — Anthony Scaramucci, Fortune, 28 June 2026

The eggs hatch, burrow into the bloodstream, and then go wandering around, embedding in various tissues, muscles, and organs, including the brain. — Beth Mole, ArsTechnica, 26 June 2026

These proteins are usually flushed into the bloodstream through the blood-brain barrier. — Devika Rao, TheWeek, 26 June 2026

In other words, avocado helps move more of those antioxidants from your plate into your bloodstream. — Kathleen Ferraro, Verywell Health, 26 June 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