mercurialis

noun
mer·​cu·​ri·​a·​lis | \ (ˌ)mər-ˌkyu̇-rē-ˈā-ləs How to pronounce mercurialis (audio) , -ˈa-lis How to pronounce mercurialis (audio) \

Medical Definition of mercurialis

: an herb (Mercurialis annua) of the spurge family formerly dried for use as a purgative, diuretic, and antisyphilitic

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