A glycerol with three fatty acids attached is called a triglyceride. It is an ester, and is also known by the names triacylglycerol and triacylglyceride. The infix "-acyl-" in the names refers to a carboxylic acid derivative, and fatty acids are long hydrocarbon chains with a carboxylic acid end.
Humans store reduced carbon for energy as triglycerides. In addition, triglycerides help to transfer adipose fat and blood glucose to and from the liver in humans. Triglycerides are the main component of human skin oils and vegetable oil. An excessive amount of triglycerides in the human bloodstream has been linked to atherosclerosis, heart disease and stroke.