/mel'euh kooh"meuh, -euh zooh"-, -euhk sooh"-/ , n. Plant Pathol.
a disease of trees, esp. walnuts, characterized by an inky-black liquid oozing from the affected twigs, branches, and trunk, and by bark cankers, caused by any of several fungi, as Dothiorella gregaria.
[ 1930-35; méla ( s ) black + chýma fluid (with x- repr. Gk ch- ) ]