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Any blue or green mold in the genus Penicillium (kingdom Fungi; seefungus). Common on foodstuffs, leather, and fabrics, they are economically important in producing antibiotics (seepenicillin), organic acids, and cheeses such as English Stilton, Italian Gorgonzola, and French Roquefort.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Penicillium, visit Britannica.com.
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