We found 2 dictionaries that define the word witches' thimbles:

General (2 matching dictionaries)

1. witches'-thimbles: Merriam-Webster
2. witches' thimbles: Wiktionary

Definitions from Wiktionary (witches' thimbles) ▸ noun:  The foxglove. ▸ Words similar to witches' thimbles ▸ Usage examples for witches' thimbles ▸ Idioms related to witches' thimbles ▸ Wikipedia articles (New!) ▸ Words that often appear near witches' thimbles ▸ Rhymes of witches' thimbles ▸ Invented words related to witches' thimbles