[EPA, Terms & Acronyms Glossary]:
a common name for a fungus that leaves a thin white coating on the surface of plants and other materials where it grows.

[USDA National Agricultural Library Glossary]

[ISO 7482-1:1998, 3.3.3.6]:
visible development of saprophytic fungus on the flesh side of the skin, promoted by prolonged storage in too humid an atmosphere ; it can also result in an alteration in the grain on the tanned skin.