An onion Allium cepa L., from Latin cepa signifying `onion`, otherwise called the bulb onion or normal onion, is a vegetable that is the most broadly developed types of the sort Allium. The shallot is a plant assortment of the onion which was named a different animal categories until 2010. Its direct relations incorporate garlic, scallion, leek, and chive.
This sort likewise contains a few different animal categories differently alluded to as onions and developed for food, for example, the Japanese clustering onion Allium fistulosum, the tree onion A. × proliferum, and the Canada onion Allium canadense. The name wild onion is applied to various Allium species, however A. cepa is solely known from development. Its tribal wild unique structure isn`t known, despite the fact that getaways from development have become laid out in some regions. The onion is most often a biennial or an enduring plant, yet is generally treated as a yearly and gathered in its most memorable developing season.