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 (Zool.), the grenadier. -- Onion fly (Zool.) 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 ]
n. (Architecture) A dome with a pointed top, its width often extending beyond the width of the tower it covers; -- a style of architecture characteristic of Russian Orthodox churches. [ PJC ]
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