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Noun: boil smut  boyl smút
  1. A common smut attacking Indian corn causing greyish white swellings that rupture to expose a black spore mass
    "Boil smut severely affected the corn harvest that year";
    - Ustilago maydis

Derived forms: boil smuts

Type of: corn smut, cornsmut

Part of: genus Ustilago, Ustilago