noun hel·le·bore \ˈhe-lə-ˌbr\

Definition of HELLEBORE

:  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 (as H. niger) formerly used in medicine
:  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


Middle English elebre, from Anglo-French, from Latin elleborus, helleborus, from Greek helleboros
First Known Use: 15th century
Medical Dictionary


noun hel·le·bore \ˈhel-ə-ˌbō(ə)r, -ˌb(ə)r\

Medical Definition of HELLEBORE

a :  any herb of the genus Helleborus b :  the dried roots and rhizome of any medicinal herb of the genus Helleborus (as black hellebore H. niger or green hellebore H. viridis) or a powder or extract of this used by the ancient Greeks and Romans in treating mental and other disorders
a :  any of several poisonous herbs of the genus Veratrum b :  the dried rhizome and roots of either of two hellebores of the genus Veratrum (the false hellebore V. viride of America and V. album of Europe) or a powder or extract of this containing alkaloids (as protoveratrine) used as a cardiac and respiratory depressant and also as an insecticide—called also veratrum, white hellebore


Next Word in the Dictionary: hellebore greenPrevious Word in the Dictionary: hell drivingAll Words Near: hellebore
July 06, 2015
categorical Hear it
absolute or relating to a category
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears