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chestnut blight

noun Plant Pathology.
  1. a disease of chestnuts, especially the American chestnut, characterized by bark lesions that girdle and eventually kill the tree, caused by a fungus, Endothia parasitica.
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Origin of chestnut blight

An Americanism dating back to 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018