leaf-spot

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:
1900–05

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
leaf spot
 
n
any of various plant diseases, usually caused by fungi: characterized by dark lesions on the leaves

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
leaf spot  
Any of various plant diseases resulting in well-defined necrotic areas on the leaves.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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