noun
blue mold; penicillium
Refers to the bluish-green mold commonly found on food, especially citrus fruits, and also to the genus Penicillium.
パンに青カビが生えてしまった。
Blue mold has grown on the bread.
青カビから作られるチーズもある。
Some cheeses are made from blue mold.
Compound of 青 (ao, 'blue') and カビ (kabi, 'mold'). The reading is straightforward.