- ergot - a plant disease caused by the ergot fungus
--1 is a kind of plant disease
- ergot, Claviceps purpurea - 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
--2 is a kind of fungus
--2 is a member of Claviceps, genus Claviceps
--2 has particulars: rye ergot - ergot, Claviceps purpurea - 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