leaf spot

noun Plant Pathology.
  1. a limited, often circular, discolored, diseased area on a leaf, usually including a central region of necrosis.
  2. any disease so characterized.

Origin of leaf spot

First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for leaf spot

leaf spot

noun
  1. any of various plant diseases, usually caused by fungi: characterized by dark lesions on the leaves
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

leaf spot in Science

leaf spot

  1. Any of various plant diseases resulting in well-defined necrotic areas on the leaves.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.