noun
: a disease of violets and especially of the sweet violet caused by a fungus ( Sphaceloma violae ) and characterized by brownish warty outgrowths on the leaves which become brittle and crack very easily when handled
noun
: a disease of violets and especially of the sweet violet caused by a fungus ( Sphaceloma violae ) and characterized by brownish warty outgrowths on the leaves which become brittle and crack very easily when handled
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012