mercurialis
noun
mer·cu·ri·a·lis
| \ (ˌ)mər-ˌkyu̇-rē-ˈā-ləs
, -ˈa-lis
\
, -ˈa-lis
\
Medical Definition of mercurialis
: an herb (Mercurialis annua) of the spurge family formerly dried for use as a purgative, diuretic, and antisyphilitic