noun. large genus of perennial and biennial pungent bulbous plants: garlic; leek; onion; chive; sometimes placed in family Alliaceae as the type genus.
1. Adjective 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.
