Oleic acid is a fatty acid that is present in oils and fats. It is also known as cis-octadec-9-enoic acid and is characterized by its double bond between the ninth and tenth carbon atoms. Synonyms for oleic include oleagic, elaidic, cis-9-octadecenoic, and cis-octadecenoic acid. Oleic acid is a versatile compound that is used in various industries such as food, cosmetics, and pharmaceuticals. It has been known to have health benefits, including improving heart health, reducing inflammation, and promoting skin health. With its numerous applications and benefits, oleic acid and its synonyms continue to be a popular topic of research and study.