mildew
/ˈmɪl.d(j)u/ noun C2- A growth of minute powdery or webby fungi, whitish or of different colors, found on various diseased or decaying substances.
Plural mildews
From the library
A vulgar flaring paper adorned the walls, but it was blotched in places with mildew, and here and there great strips had become detached and hung down, exposing the yellow plaster beneath.
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