on·ion /ˈʌnjən/
 洋蔥(vt.)因洋蔥使掉淚


 onion
 洋蔥


 On·ion n.
 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.
 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.

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 onion
      n 1: edible bulb of an onion plant
      2: bulbous plant having hollow leaves cultivated worldwide for
         its rounded edible bulb [syn: onion plant, Allium cepa]
      3: an aromatic flavorful bulb


 Onion
    The Israelites in the wilderness longed for the "onions and
    garlick of Egypt" (Num. 11:5). This was the _betsel_ of the
    Hebrews, the Allium cepe of botanists, of which it is said that
    there are some thirty or forty species now growing in Palestine.
    The onion is "the 'undivided' leek, _unio_, _unus_, one."