wolfsbane n 1: poisonous Eurasian perennial herb with broad rounded leaves and yellow flowers and fibrous rootstock [syn: {wolfsbane}, {wolfbane}, {wolf's bane}, {Aconitum lycoctonum}]
Wolfsbane \Wolfs"bane`\, n. (Bot.) A poisonous plant ({Aconitum Lycoctonum}), a kind of monkshood; also, by extension, any plant or species of the genus {Aconitum}. See {Aconite}. [1913 Webster]