Oleate is a 6-letter term that is a component of olive oil. It is an ester of oleic acid, which is a fatty acid found in many animal and vegetable fats and oils. Oleate is a major component of olive oil, accounting for up to 83% of its fatty acid content. It is also found in other plant oils such as sunflower, safflower, and soybean oil. Oleate is known to have antioxidant properties and is used in the production of soaps, detergents, and cosmetics.