will-o'-the-wisp

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Related to Corpse fire: ignis fatuus, Willow Wisp, Will-o-wisp

will-o'-the-wisp,

phenomenon known also as ignis fatuus and jack-o'-lantern. It is seen at night as a pale, flickering light over marshland. There is no generally accepted explanation for it; it may result from the spontaneous ignition of gases (e.g., methane) produced by the disintegration of dead plant or animal matter, or it may be a form of phosphorescence. The eerie lights have given rise to many superstitions.
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