Mil'dew1, n.
(mĭl'dū), n. [A-S. mildeáw, O. H. Ger. militou, M. H. Ger. militou, N. H. Ger. mehlthau, for melthau.] A thin, whitish, powdery or cobweb-like coating, consisting of minute fungi, and found on various diseased or decaying substances.