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