| thimbleweed | (n) a common North American anemone with cylindrical fruit clusters resembling thimbles, Syn. Anemone cylindrica |
| longheaded thimbleweed | (n) thimbleweed of northern North America, Syn. Anemone riparia |
| virginia thimbleweed | (n) thimbleweed of central and eastern North America, Syn. Anemone virginiana |
| Thimbleweed | n. (Bot.) Any plant of the composite genus |