A single yellow onion.
- a plant (Allium cepa) of the lily family, having an edible bulb with a strong, sharp smell and taste
- the bulb of this plant, formed of close, concentric layers of leaf bases
- any of various related plants
Origin of onionMiddle English oynon ; from Old French oignon ; from Classical Latin unio (gen. unionis), oneness, unity, also a kind of single onion: see union
- a. A bulbous plant (Allium cepa) cultivated worldwide as a vegetable.b. The rounded edible bulb of this plant, composed of fleshy, tight, concentric leaf bases having a pungent odor and taste.
- Any of several other plants in the genus Allium.
Origin of onionMiddle English oinyon, from Old French oignon, from Latin uniō, uniōn-.
Middle English onyon, union, oinyon, from Anglo-Norman union et al. and Old French oignon, from Latin ūniōnem, accusative of ūniō (“onion, large pearl”) (probably from ūnus (“one”), but perhaps compare Hittite wašḫar (“garlic”), Sanskrit उष्ण (uṣṇa, “onion”), Pashto ووږه (ūža, “garlic”), Khowar wǝẓnū (“garlic”) ). Displaced the inherited term ramsons.