blue mold


: 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 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 Creamy on the inside and flaky on the exterior, this goat’s milk cheese pyramid gets a thin coating of blue mold halfway through its four-week aging period, giving it a very mild tang that lets the grassy flavors of the goat’s milk shine through. Washington Post, 8 Sep. 2021 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 Overlooked things remain: cutlery on the kitchen, a loaf in the bread bin now a cube of blue mold, newspapers and coal under the stairs, calendars on the wall, permanently stalled at May 15, 1940. Andrew Liptak, The Verge, 31 Mar. 2018

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'blue mold.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1664, in the meaning defined above

Time Traveler
The first known use of blue mold was in 1664

Dictionary Entries Near blue mold

Cite this Entry

“Blue mold.” Dictionary, Merriam-Webster, Accessed 12 Apr. 2024.

Kids Definition

blue mold

: a fungus and especially a penicillium that produces blue or blue-green growths

Medical Definition

blue mold

: any of various fungi of the genus Penicillium that produce blue or blue-green surface growths
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