noun. large genus of perennial and biennial pungent bulbous plants: garlic; leek; onion; chive; sometimes placed in family Alliaceae as the type genus.
- wild onion
- alliaceous plant
- Hooker's onion
- family Liliaceae
- lily family
- liliid monocot genus
- Allium acuminatum
Example sentences of the word allium
Plant taxonomists used to consider agapanthus a member of the Alliaceae or allium family.
2. Noun, singular or mass
Onions are members of the allium family that can grow in greenhouses at 50 to 80 degrees F of soil temperature.