HEL'LEBORE, noun [Latin helleborus.] The name of several plants of different genera, the most important of which are the black hellebore Christmas rose, or Christmas flower, of the genus Helleborus, and the white hellebore of the genus Veratrum. Both are acrid and poisonous, and are used in medicine as evacuants and alternatives.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI