A phosphorescent light seen over marshy ground at night, caused by
spontaneous combustion of gases emitted by decomposing organic matter.
A synonym is foxfire (not Firefox), especially for luminescence produced by fungi.
[The first use of the term is in John Milton's 1632 poem L'Allegro:
"She was pinched and pulled, she said; / And he, by Friar's lantern led."]
Dec 20, 2007
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