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A common bulb vegetable with juicy flesh and a pungent vapour. Used in savoury dishes.
As a general rule, the hotter the climate the onions are grown in, the milder they are - so the frequently-found Spanish varieties are milder than home produced onions. See 'Onions, Culinary uses'; 'Onions, keeping'; 'Onions, Medicinal uses'; 'Tree Onion'