A growth of minute powdery or webby fungi, whitish or of different colors, found on various diseased or decaying substances.
Verb
To taint with mildew.
To become tainted with mildew.
Origin
From Middle English mildewe, from Old English meledeaw, mildēaw, from Proto-West Germanic *milidauw, from *mili + *dauw. Compare West Frisian moaldau, Dutch meeldauw, German Mehltau. More at dew.
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