rye ergot

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Related to rye ergot: Claviceps purpurea
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Noun1.rye ergot - a sclerotium or hardened mass of mycelium
Claviceps purpurea, ergot - 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