Mildew

(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.

(mĭl'dū), v. t. [imp. & p. p. MILDEWED; p. pr. & vb. n. MILDEWING.] To taint with mildew. “He mildews the white wheat.” Milton.