ˌmeləˈkümə, -ləkˈsü-, -ləˈzü- noun
( -s )
Etymology: New Latin, probably irregular (Greek χ being taken as English x ) from mela- + Greek chyma fluid, from chein to pour — more at found (melt)
: any of various plant diseases producing dark or black bark cankers ; especially : a disease of the walnut caused by the imperfect fungus ( Dothiorella gregaria )