black spot

noun

Definition of black spot

1 : any of several bacterial or fungal diseases of plants characterized by black spots or blotches especially on the leaves

2 chiefly British : a dangerous or troublesome place or area … Wisteria Lane has always been a major accident black spot.— Jane Simon

Examples of black spot in a Sentence

Recent Examples on the Web This application will greatly reduce the future incidence and severity of the three main fungal diseases that afflict roses — powdery mildew, rust and black spot. — Earl Nickel, San Francisco Chronicle, 1 Apr. 2022 The injection site soon developed a nasty black spot. — Jennifer Ouellette, Ars Technica, 2 Jan. 2022 One scene showed him looking at images of his brain, where a black spot marked the missing 70 percent of his left temporal lobe, according to an account in Nautilus magazine. — BostonGlobe.com, 3 Nov. 2021 One scene showed him looking at images of his brain, where a black spot marked the missing 70 percent of his left temporal lobe, according to an account in Nautilus magazine. — Washington Post, 3 Nov. 2021 The biggest black spot has been co-working startup WeWork. — Ananya Bhattacharya, Quartz, 1 Oct. 2021 In a wet year, even a disease-resistant rose bush may get black spot, a fungus disease. — Beth Botts, chicagotribune.com, 19 Sep. 2021 That first rose, like those that followed, is impervious to bugs and black spot, blooms from last to first frost, is winter hardy and is self-cleaning. — Joanne Kempinger Demski, Milwaukee Journal Sentinel, 27 Aug. 2021 Add 1 ounce of molasses per gallon of spray. Treat black spot and powdery mildew with hydrogen peroxide, and see the Organic Rose Program on dirtdoctor.com. — Howard Garrett, Dallas News, 23 Aug. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'black spot.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.