noun Date: 1923 any of various plant diseases caused by viruses (genus Nepovirus of the family Comoviridae ) and marked by circular lesions of usually chlorotic or necrotic tissue, a turf disease caused by an ascomycetous fungus ( Leptosphaeria korrae syn. Ophiosphaerella korrae ) and marked by circular patches or rings of dead grass
RING SPOT
Meaning of RING SPOT in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012