(more properly known as, TAG or triacylglyceride)'s a glyceride in which the glycerol's esterified with three fatty acids. It's the main constituent of vegetable oil and animal fats. Chemical structure Triglycerides are formed from a single molecule of glycerol, combined with three fatty acids on each of the OH groups, and make up most of fats digested by humans. Ester bonds form between each fatty acid and the glycerol molecule. This's where the enzyme pancreatic lipase acts, hydrolysing the… (More on Triglycerides)