- any of various types of fluid found in the body of a human or animal, as blood or urine.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- A natural bodily fluid or secretion of fluid such as blood, semen, or saliva.
- Total body water, contained principally in blood plasma and in intracellular and interstitial fluids.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.