- any of several composite plants of the genus Bidens, having rayless yellow flowers and barbed achenes that cling to clothing.
- the achenes of these plants.
- any of several other plants having seeds or fruits that cling to clothing, as those of the genus Desmodium.
- any of various plants, such as the bur marigold and tick trefoil, having fruits or seeds that cling to clothing, fur, etc
- the seed or fruit of any of these plants
