Definition that contains poisonous
- bittersweet poisonous perennial Old World vine having violet flowers and oval coral-red berries; widespread weed in North America
- hemlock poisonous drug derived from an Eurasian plant of the genus Conium
- wolfsbane poisonous Eurasian perennial herb with broad rounded leaves and yellow flowers and fibrous rootstock
- henbane poisonous fetid Old World herb having sticky hairy leaves and yellow-brown flowers; yields hyoscyamine and scopolamine
- pseudoephedrine poisonous crystalline alkaloid occurring with ephedrine and isomorphic with it
- wolfbane poisonous Eurasian perennial herb with broad rounded leaves and yellow flowers and fibrous rootstock
- neurotoxic poisonous to nerves or nerve cells
- rhus toxicodenedron poisonous shrub of southeastern United States causing a rash on contact
- myrtle spurge poisonous Old World spurge; adventive in America; seeds yield a purgative oil
- black henbane poisonous fetid Old World herb having sticky hairy leaves and yellow-brown flowers; yields hyoscyamine and scopolamine