The onion is one of the oldest known human with vegetables. Used in most of the world's civilizations. Onion is currently available fresh, frozen, canned, processed state or blow-dry.

Onions usually used a clip or segments in most types of food such as cooked dishes or some authorities, is different from the taste of the onion where a sharp and warm with a strong flavor or sweet and has a mild flavor.

In some areas, pickled onions eaten as a snack, in India, is the basic varieties of onions in the eating, so it is essential in Indian cuisine. It is usually used as a basis for Carey.

Tissue found in onions has recently been used in the scientific study to demonstrate the use of the microscope, where there is a large onion into the fabric of easy observation cells even in cases of small enlarge.