onion

1. is a type of: bulb - a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
   is a part of: allium cepa, onion, onion plant - bulbous plant having hollow leaves cultivated worldwide for its rounded edible bulb
2. is a type of: alliaceous plant - bulbous plants having a characteristic pungent onion odor
   subtypes:

   • allium ascalonicum, allium cepa aggregatum, eschalot, multiplier onion, shallot - type of onion plant producing small clustered mild-flavored bulbs used as seasoning
   • allium cepa viviparum, egyptian onion, top onion, tree onion - type of perennial onion grown chiefly as a curiosity or for early salad onions; having bulbils that replace the flowers
   • allium fistulosum, japanese leek, welsh onion - Asiatic onion with slender bulbs; used as early green onions
   • allium haematochiton, red-skinned onion - onion with white to deep red tunic; California
   has: onion - the bulb of an onion plant
   substance holonym: isothiocyanate - a family of compounds derived from horseradish and radishes and onions and mustards; source of the hotness of those plants and preparations
   same as: allium cepa, onion plant
3. is a type of: veg, vegetable, veggie - edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous herbaceous plant
   subtypes:

   • bermuda onion - mild flat onion grown in warm areas
   • green onion, scallion, spring onion - a young onion before the bulb has enlarged; eaten in salads
   • vidalia onion - sweet-flavored onion grown in Georgia
   • spanish onion - large mild and succulent onion; often eaten raw
   • shallot - small mild-flavored onion-like or garlic-like clustered bulbs used for seasoning

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