Disease of cereal grasses, especially rye, caused by the fungus Claviceps purpurea. An ear of rye infected with ergot exudes a sweet, yellowish mucus. Ergot is the source of drugs used to control postpartum hemorrhage and to treat migraine headaches. Lysergic acid, from which the powerful hallucinogen LSD is synthesized, comes from ergot. Taking an overdose of ergot-derived medications or eating flour milled from ergot-infected rye can cause ergotism (also called St. Anthony's Fire) in humans and livestock; symptoms may include convulsions, miscarriages in females, and dry gangrene, and may result in death
a fungus that infects various cereal plants forming compact black masses of branching filaments that replace many grains of the plant; source of medicinally important alkaloids and of lysergic acid
The sclerotium (wintering stage) of certain fungi in the genus Claviceps, appearing as a deformed grain in certain cereals and grasses infected by the fungi