Elaeostearic acid is a fatty acid found in certain vegetable oils, such as tung oil and vernonia oil. Its chemical formula is C18H34O2. It is also known by other names such as 9-octadecenoic acid (Z)-, vernonia acid, tungstearic acid, 9Z-octadeca-9-enoic acid and cis-9-octadecenoic acid. These synonyms are often used interchangeably with elaeostearic acid depending on the context and purpose of the discussion. These names can be used in scientific research, food industry, and cosmetic manufacturing among other fields. Understanding these synonyms is essential in communicating effectively about the uses and properties of elaeostearic acid derivatives.