1. any of various fungi of the family Peronosporaceae parasitic on e.g. grapes and potatoes and melons; [syn: downy mildew, false mildew]
WordNet (r) 3.0 (2006):
downy mildew
n 1: any of various fungi of the family Peronosporaceae
parasitic on e.g. grapes and potatoes and melons [syn:
downy mildew, false mildew]