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Meaning of late blight

late' blight'

Pronunciation: [key]
— Plant Pathol. Plant Pathol.
  1. a disease of plants, esp. potatoes, celery, etc., characterized by spotting, blighting, and withering or decay of the entire plant, caused by any of several fungi, as Phytophthora infestans or Septoria apii.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.