mildew

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mildew

[AS. mildeaw]
Lay term for a discoloration or superficial coating on various materials caused by the growth of fungi. It occurs in damp conditions.
Medical Dictionary, © 2009 Farlex and Partners

mildew

  1. a plant disease caused by a fungus.
  2. any fungus, such as Erysiphe, that causes cereal mildew.
  3. a fungus in the mycelial state, growing over a substrate without obvious fruiting bodies.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005