| Ester (n.) An ethereal salt, or compound ether, consisting of an organic radical united with the residue of any oxygen acid, organic or inorganic; thus the natural fats are esters of glycerin and the fatty acids, oleic, etc. Thesaurus Entries animal oil, cerate, drying oil, essential oil, fat, fatty oil, fixed oil, glycerin, glycerin jelly, glycerogel, glycerogelatin, glycerol, glycerole, grease, hydrogenated fat, lipid, margarin, mineral oil, oil, olein, oleum, palmitin, polyunsaturated fat, sebum, stearin, tallow, triolein, tripalmitin, tristearin, unsaturated fat, vegetable oil, volatile oil |