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[trahy-glis-uh-rahyd, -er-id] /traɪˈglɪs əˌraɪd, -ər ɪd/
noun, Biochemistry, Chemistry
an ester obtained from glycerol by the esterification of three hydroxyl groups with fatty acids, naturally occurring in animal and vegetable tissues: an important energy source forming much of the fat stored by the body.
Compare glyceride.
Origin of triglyceride
1855-60; tri- + glyceride Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for triglyceride
  • If high triglyceride levels persist despite diet changes, medication may be needed.
  • Blood cholesterol and triglyceride levels may increase.
  • Studies have linked it to lower cholesterol, serum triglyceride levels and blood pressure.
  • Persons with this condition develop high cholesterol or triglyceride levels during the teenage years.
  • It is a triglyceride, an ester derived from glycerol and three fatty acid groups.
British Dictionary definitions for triglyceride


any ester of glycerol and one or more carboxylic acids, in which each glycerol molecule has combined with three carboxylic acid molecules. Most natural fats and oils are triglycerides
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
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Word Origin and History for triglyceride

1860, malformed from tri- + glyceride. So called for the three radicals.

Online Etymology Dictionary, © 2010 Douglas Harper
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triglyceride in Medicine

triglyceride tri·glyc·er·ide (trī-glĭs'ə-rīd')
See triacylglycerol.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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triglyceride in Science
Any of a class of organic compounds that are esters consisting of three fatty acids joined to glycerol. The fatty acids may be the same or may be different. Triglycerides are the chief lipids constituting fats and oils and function to store chemical energy in plants and animals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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