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Definition of Onion
1. Noun. The bulb of an onion plant.
2. Noun. Bulbous plant having hollow leaves cultivated worldwide for its rounded edible bulb.
Generic synonyms: Alliaceous Plant
Specialized synonyms: Allium Ascalonicum, Allium Cepa Aggregatum, Eschalot, Multiplier Onion, Shallot, Allium Cepa Viviparum, Egyptian Onion, Top Onion, Tree Onion, Allium Fistulosum, Japanese Leek, Welsh Onion, Allium Haematochiton, Red-skinned Onion
Terms within: Isothiocyanate
3. Noun. An aromatic flavorful vegetable.
Specialized synonyms: Bermuda Onion, Green Onion, Scallion, Spring Onion, Vidalia Onion, Spanish Onion, Shallot
Definition of Onion
1. n. A liliaceous plant of the genus Allium (A. 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.
Definition of Onion
1. Noun. A monocotyledonous plant of genus ''Allium'' allied to garlic, used as vegetable and spice. ¹
2. Noun. The bulb of such a plant. ¹
3. Noun. The genus as a whole. ¹
4. Noun. (obsolete baseball slang) A ball. ¹
5. Noun. (context: colloquial chiefly archaic) A person from Bermuda or of Bermudian descent. ¹
¹ Source: wiktionary.com
Definition of Onion
1. the edible bulb of a cultivated herb [n -S] : ONIONY [adj]
Medical Definition of Onion
1.