triacylglycerol

[ trī-ăs′əl-glĭsə-rôl′, -rōl′ ]

n.

A naturally occurring ester of three fatty acids and glycerol that is the chief constituent of fats and oils.triglyceride
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.