Fat

(1) Chemically, fats (or lipids) are substances that are insoluble in water but soluble in organic solvents such as ether, chloroform and benzene, and are actual or potential esters of
fatty acids. The term includes triacylglycerols (triglycerides), phospholipids, waxes and steroids.
(2) In more general use the term ‘fats’ refers to the neutral fats, which are esters of fatty acids with glycerol (triacylglycerols or triglycerides).