Alternative form of poison-pen letter

(idiomatic) A missive which is malicious, insulting, and/or defamatory toward a person, organization, or point of view, especially one which is unsigned.

Toxicodendron radicans, the ivy-like species of Toxicodendron, common in the eastern United States, known for its ability to cause an itching rash and blistering for most people, through urushiol.

Toxicodendron rydbergii, an ivy-like species of Toxicodendron common in the western United States, well-known for its ability to causes an itching rash and blistering for most people, through urushiol, an oil that is a skin irritant.

plural of poison arrow frog

poison dart frog

(idiomatic) To indicate what type of alcoholic beverage one wishes to be served.

(toxicology) The damage that a substance causes is more determined more by its quantity than its essence.

The shrub Acokanthera oppositifolia, containing toxic cardiac glycosides used for poisoning arrows.

plural of poison pen letter