noun
: a plant disease especially of fungous origin producing irregular dead or discolored areas in the leaves and distinguished from leaf spot mainly by the more indistinct or diffuse margins
noun
: a plant disease especially of fungous origin producing irregular dead or discolored areas in the leaves and distinguished from leaf spot mainly by the more indistinct or diffuse margins
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012