Any of several low-growing, blue-flowered plants of (or formerly of) the genus Lithospermum (family Boraginaceae); especially the purple gromwell, L. purpureocaeruleum.
Origin
Late 18th century; earliest use found in John Collinson (1757–1793), antiquary.
Definition of blue gromwell in US English:
blue gromwell
noun
rare
Any of several low-growing, blue-flowered plants of (or formerly of) the genus Lithospermum (family Boraginaceae); especially the purple gromwell, L. purpureocaeruleum.
Origin
Late 18th century; earliest use found in John Collinson (1757–1793), antiquary.