onion

onion
noun

a swollen edible bulb with a pungent taste and smell, composed of several concentric layers, used in cooking as a vegetable and flavouring
洋葱
the plant that produces this bulb, with long rolled or strap-like leaves and spherical heads of greenish-white flowers
洋葱类植物
Allium cepa, family Liliaceae (or Alliaceae)
拉丁名Allium cepa，百合科（或葱科）

常用词组
know one's onions

派生
oniony
adjective
语源

Middle English: from Old French oignon, based on Latin unio(n-), denoting a kind of onion

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