leaf spot

American

noun

Plant Pathology.

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

leaf spot British

noun

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 Scientific

Any of various plant diseases resulting in well-defined necrotic areas on the leaves.

Etymology

Origin of leaf spot

First recorded in 1900–05

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A: This is viburnum leaf spot and it is quite common.

From Seattle Times • Feb. 22, 2023

Other common ailments are Alternaria leaf spot, white mold, bean rust, and mosaic virus, which can be avoided by keeping leaves dry and trellising or pruning to allow maximum airflow between vines.

From Salon • May 30, 2022

Bacterial leaf spot, or basil shoot blight, is a major uh-oh when it comes to pathogens.

From Salon • May 18, 2022

Two of the most common fungal diseases may, at first glance, look similar — and you may even have them both: Alternaria, or early blight, and Septoria leaf spot.

From Seattle Times • Jul. 26, 2021

My 18 Carpathians are all growing with varying vigor and resistance to leaf spot.

From Northern Nut Growers Association Incorporated 39th Annual Report at Norris, Tenn. September 13-15 1948 by Northern Nut Growers Association

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023