The Collaborative International Dictionary of English v.0.48:
Allium \Al"li*um\, n. [L., garlic.] (bot.) A genus of plants, including the onion, garlic, leek, chive, etc. [1913 Webster]WordNet (r) 3.0 (2006):
Allium n 1: large genus of perennial and biennial pungent bulbous plants: garlic; leek; onion; chive; sometimes placed in family Alliaceae as the type genus [syn: Allium, genus Allium]