Any of a genus (Lithospermum) of plants of the borage family, with yellow or orange flowers and hard, stonelike nutlets.
Origin of gromwell
- Alteration (probably influenced by speedwell) of Middle English gromil from Old French gro- of unknown meaning mil millet (from Latin milium millet)
From American Heritage Dictionary of the English Language, 5th Edition
- Called also gromel, grommel, graymill, and gray millet, all probably from French; compare Welsh cromandi.