melaxuma

noun
mel·​a·​xu·​ma | \ˌmeləˈkümə, -ləkˈsü-, -ləˈzü-\
plural -s

Definition of melaxuma 

: any of various plant diseases producing dark or black bark cankers especially : a disease of the walnut caused by the imperfect fungus (Dothiorella gregaria)

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History and Etymology for melaxuma

New Latin, probably irregular (Greek χ being taken as English x) from mela- + Greek chyma fluid, from chein to pour (melt)

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