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[in-truh-vee-nuh s]
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  1. within a vein.
  2. of, pertaining to, employed in, or administered by injection into a vein: an intravenous solution.
  1. an intravenous injection.
  2. intravenous feeding. Abbreviation: IV

Origin of intravenous

First recorded in 1840–50; intra- + venous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for intravenous


  1. anatomy within a veinan intravenous injection Abbreviations (esp of an injection): IV, i.v.
Derived Formsintravenously, adverb
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 intravenous


1847, coined in English from intra- "within, inside" + Latin venous, from vena "vein" (see vein). Related: Intravenously.

Online Etymology Dictionary, © 2010 Douglas Harper

intravenous in Medicine


  1. Within or administered into a vein.
Related formsin′tra•venous•ly adv.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

intravenous in Science


  1. Existing or occurring within a vein.
  2. Administered into a vein, as an injection.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

intravenous in Culture



A descriptive term for things within a vein. Intravenous feeding or medication is the passing of nutrients or medicines into a vein through a tube.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.