Ortalis flexa

Onion On"ion, n. [F. ognon, fr. L. unio oneness, unity, a single large pearl, an onion. See {One}, {Union}.] 1. (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. [1913 Webster]

2. The flavor of an onion[1]. [PJC]

{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}. [1913 Webster]