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melaxuma

[mel-uh-koo-muh, -uh-zoo-, -uh k-soo-]
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noun Plant Pathology.
  1. a disease of trees, especially 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.
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Origin of melaxuma

1930–35; < New Latin, irregular < Greek mélā(s) black + chýma fluid (with x- representing Greek ch-)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018