Oleo (noun)

A spread made from vegetable oils, often used as a substitute for butter.

Origin:

Derived from the latin word "oleum" meaning "oil".

Examples:

1. I spread oleo on my toast for breakfast.
2. The cook used oleo to fry the eggs.
3. Oleo was a popular margarine in the early 20th century.
4. Many people prefer oleo to butter because it's cheaper.
5. Oleo is a common ingredient in baking, particularly in making pastries.