Olive oil is a liquid fat obtained from olives (the fruit of olea europaea; family oleaceae), a traditional tree crop of the mediterranean basin, produced by pressing whole olives and extracting the oil. it is commonly used in cooking: for frying foods or as a salad dressing. it can be found in some cosmetics, pharmaceuticals, soaps, and fuels for traditional oil lamps. it also has additional uses in some religions. the olive is one of three core food plants in mediterranean cuisine; the other two are wheat and grapes. olive trees have been grown around the mediterranean since the 8th millennium bc. spain accounts for almost half of global olive oil production; other major producers are p...

Source: Wikipedia