/ ˈdraɪ ˈrɑːt /
1. A crumbling and drying of timber or bulbs or potatoes or fruit caused by a fungus.
2. A fungus causing dry rot.
Infection of timber in damp conditions by fungi, such as Merulius lacrymans, that form a threadlike surface. Whitish at first, the fungus later reddens as reproductive spores are formed. Fungoid tentacles also enter the fabric of the timber, rendering it dry-looking and brittle. Dry rot spreads rapidly through a building.