The term 'Derived from Oil' can be summarized by the crossword solution 'Oleic, ' which is a five-letter word. Oleic acid is a fatty acid found in many animal and vegetable fats and oils, and is the most common fatty acid found in nature. It is a monounsaturated omega-9 fatty acid, meaning it has one double bond in its structure. Oleic acid is used in the production of soaps, lubricants, and surfactants, and is also used as a food additive.