noun Date: circa 1899 a disease of apple trees caused by a fungus ( Venturia inaequalis ) producing dark blotches or lesions on the leaves, fruit, and sometimes the young twigs
APPLE SCAB
Meaning of APPLE SCAB in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012