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body fluid

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noun
  1. any of various types of fluid found in the body of a human or animal, as blood or urine.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

body fluid in Medicine

body fluid

n.
  1. A natural bodily fluid or secretion of fluid such as blood, semen, or saliva.
  2. Total body water, contained principally in blood plasma and in intracellular and interstitial fluids.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.