any of various usually poisonous plants of the genus Aconitum having tuberous roots and palmately lobed leaves and blue or white flowers
{i} any of a number of plants having poisonous roots; dried poisonous roots of these plants
The herb wolfsbane, or monkshood; applied to any plant of the genus Aconitum (tribe Hellebore), all the species of which are poisonous
Any member of two genera of perennial herbaceous plants of the buttercup family: Aconitum (monkshood or wolfsbane), consisting of summer-flowering poisonous plants, and Eranthis (winter aconite), consisting of spring-flowering ornamentals. The dried tuberous root of A. napellus was formerly used as a sedative and a painkiller
Any of various Eurasian herbs of the genus Eranthis, especially E. hyemalis, having palmately dissected leaves and a solitary yellow flower that blooms in winter or early spring