• synonyms


  1. the blood flowing through a circulatory system.
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Origin of bloodstream

First recorded in 1870–75; blood + stream
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for bloodstream

Contemporary Examples

Historical Examples

  • He depressed the piston, pumping the antidote into her bloodstream.


    Gordon Randall Garrett

  • The powerful drug in the needle-pointed head of each tiny crystal went directly into the bloodstream of each target.

    Anything You Can Do ...

    Gordon Randall Garrett

  • Knowledge of what Father would have said was for Terence a bloodstream thing, no longer traceable to any remembered words.

  • But the barbarians have kept their bloodstream pure; the Cimmerians are tall and powerful, with dark hair and blue or grey eyes.

    The Hyborian Age

    Robert E. Howard

  • However even this evil residue was fated to leave but a minor contamination of the Colony's bloodstream.

    Legends of Loudoun

    Harrison Williams

British Dictionary definitions for bloodstream


  1. the flow of blood through the vessels of a living body
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for bloodstream


also blood-stream, 1847, from blood (n.) + stream (n.).

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Online Etymology Dictionary, © 2010 Douglas Harper

bloodstream in Medicine


  1. The flow of blood through the circulatory system of an organism.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.