ˈmeləˌnōs, -ōz noun
( -s )
Etymology: French mélanose melanosis, melanose, from New Latin melanosis
1. : a disease of the grapevine caused by a fungus ( Septoria ampelina ) that attacks the leaves causing them to fall
2. : a disease of citrus trees and fruits caused by an imperfect fungus ( Diaporthe citri ) that produces hard brown raised and often gummy spots in the rind of the fruit and also on twigs and leaves