hellebore
nounDefinition of hellebore
1
: any of a genus (Helleborus) of poisonous Eurasian herbs of the buttercup family having showy flowers with petaloid sepals
also
: the dried rhizome of a hellebore (such as H. niger) formerly used in medicine
2
: a poisonous herb (genus Veratrum) of the lily family
also
: the dried rhizome of a hellebore (V. album or V. viride) that is used as an insecticide and contains toxic alkaloids that are cardiac and respiratory depressants
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