blue mold
noun
: any of various fungi (genera Penicillium and Peronospora) that produce blue or blue-green surface growths
Examples of blue mold in a Sentence
Recent Examples on the Web
One biggie is a blue mold called Penicillium expansum, which is best known for infecting apples but also attacks pears, cherries, peaches and other fruit.
—
Brad Reisfeld, The Conversation, 28 Oct. 2025
Most appeared to show blue mold in the cheese that comes with the meal.
—Ben Kesslen, Quartz, 23 Oct. 2024
Cuba was estimated to have lost 90 percent of its tobacco production in 1980 because of an outbreak of blue mold.
—Nicholas Foulkes, Robb Report, 15 Apr. 2023
Sheep’s milk cheeses with blue mold now have a unique class.
—Daniel Higgins, USA TODAY, 3 Mar. 2022
Blue cheese should also be stored away from other cheeses, because its blue mold has a tendency to travel.
—Washington Post, 8 Sep. 2021
The 20 or so specimens featured in the Harvard Museum of Natural History’s upcoming Fruits in Decay exhibition suffer from an array of ailments: among others, peach leaf curl, pear scab, gray mold, brown rot, blue mold and fire blight.
—Meilan Solly, Smithsonian, 29 Aug. 2019
Bleu des Basques is a study in textural variation: an uber rich paste of buttery, lanolin-laced sheep’s milk holds pockets of crunchy, mild, crystalline blue mold.
—Tia Keenan, Bon Appetit, 24 Apr. 2018
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Brad Reisfeld, The Conversation, 28 Oct. 2025
Most appeared to show blue mold in the cheese that comes with the meal.
—Ben Kesslen, Quartz, 23 Oct. 2024
Cuba was estimated to have lost 90 percent of its tobacco production in 1980 because of an outbreak of blue mold.
—Nicholas Foulkes, Robb Report, 15 Apr. 2023
Sheep’s milk cheeses with blue mold now have a unique class.
—Daniel Higgins, USA TODAY, 3 Mar. 2022
Blue cheese should also be stored away from other cheeses, because its blue mold has a tendency to travel.
—Washington Post, 8 Sep. 2021
The 20 or so specimens featured in the Harvard Museum of Natural History’s upcoming Fruits in Decay exhibition suffer from an array of ailments: among others, peach leaf curl, pear scab, gray mold, brown rot, blue mold and fire blight.
—Meilan Solly, Smithsonian, 29 Aug. 2019
Bleu des Basques is a study in textural variation: an uber rich paste of buttery, lanolin-laced sheep’s milk holds pockets of crunchy, mild, crystalline blue mold.
—Tia Keenan, Bon Appetit, 24 Apr. 2018
Cite this Entry
“Blue mold.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue%20mold. Accessed 10 Nov. 2025.
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