ˈ ̷ ̷ˌ ̷ ̷ noun
: any of numerous leaf diseases characterized by the concentric rings about the diseased spots: as
a.
(1) : a disease of growing tobacco caused by a parasitic fungus ( Cercospora nicotianae )
(2) : a similar and often severely defoliating disease of soybeans caused by a related fungus ( Cercospora diazu )
b. : a phase of black rot of apples in which the leaves are so spotted
• frog-eyed ˈ ̷ ̷ˌ ̷ ̷ adjective