n. bioluminescence created by some types of fungus
The Century Dictionary and Cyclopedia
n. The phosohorescent light given forth by decayed or foxed timber.
Word Usage
"His first supposition was that it was a fungus growth known in the country as "foxfire," which gives out a phosphorescent glow in the darkness; but after watching and studying it for a long time, he was convinced it was something else."