The Collaborative International Dictionary
Ortalis flexa
Onion \On"ion\, n. [F. ognon, fr. L. unio oneness, unity, a single large pearl, an onion. See One, Union.]
(Bot.) A liliaceous plant of the genus Allium ( Allium cepa), having a strong-flavored bulb and long hollow leaves; also, its bulbous root, much used as an article of food. The name is often extended to other species of the genus.
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The flavor of an onion[1].
Onion fish (Zo["o]l.), the grenadier.
Onion fly (Zo["o]l.) a dipterous insect whose larva feeds upon the onion; especially, Anthomyia ceparum and Ortalis flexa.
Welsh onion. (Bot.) See Cibol.
Wild onion (Bot.), a name given to several species of the genus Allium.