A genus of fungi that contains several species of poisonous toadstools, including A. phalloides (death cap), A. pantherina (panther cap), and A. muscaria (fly agaric). They produce toxins that cause abdominal pain, violent vomiting, and continuous diarrhea. In the absence of treatment death occurs in approximately 50% of cases, due to severe liver damage.
Any of various mushrooms of the genus Amanita (e.g., A. muscaria and A. phalloides). Most are toxic to the liver.