The onion (Allium cepa) (Latin ‚cepa‘ = onion), also known as the bulb onion or common onion, is used as a vegetable and is the most widely cultivated species of the genus Allium. This genus also contains several other species variously referred to as onions and cultivated for food, such as the Japanese bunching onion (A. fistulosum), the Egyptian onion (A. ×proliferum), and the Canada onion (A. canadense). The name „wild onion“ is applied to a number of Allium species but A. cepa is exclusively known from cultivation and its wild original form is not known. The onion is most frequently a biennial or a perennial plant, but is usually treated as an annual and harvested in its first growing season.
Or a weapon.
Cross Stitch – Chapter 24
„Why, ye should ha´told me ye were having trouble that way, Jamie lad“, said Dougal with mock concern, Jamie made a low Scottish noise in his throat. And if I´d told ye about it, you old rogue, ye would have slipped a bit of poppy juice in my ale some evening, and left me in His Grace´s bed as a wee gift.“
The table roared, and Jamie dodged as Dougal hurled an onion at him.
Ergo: Low flying onions are a serious weapon!