noun Plant Pathology.
a disease of the American elm caused by a mycoplasmalike organism, characterized by yellowing and necrosis of the foliage and yellowish-brown discoloration of the phloem.
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- phlegmonous gastritis,
- phlegmonous mastitis,
- phloem ray,
Origin of phloem necrosis
First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019