allium cepa(n = noun.plant) onion, onion plant - bulbous plant having hollow leaves cultivated worldwide for its rounded edible bulb;
is a kind of alliaceous plant
has parts: onion
has particulars: 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

allium, allium acuminatum, allium ampeloprasum, allium ascalonicum, allium canadense, allium carinatum, allium cepa aggregatum, allium cepa viviparum, allium cernuum, allium fistulosum, allium haematochiton, allium neopolitanum, allium paradoxum, allium porrum, allium sativum, allium schoenoprasum, allium scorodoprasum, allium sphaerocephalum, allium tricoccum, allium triquetrum, allium tuberosum, allium ursinum, allium vineale, genus allium