Lithospermum
noun
Lith·o·sper·mum
| \ ˌlith-ə-ˈspər-məm
\
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Medical Definition of Lithospermum
: a genus of herbs of the borage family (Boraginaceae) having polished white stony nutlets and including one (L. ruderale) used by some American Indians to make a tea held to prevent conception