ignis fatuus

[ ig-nis -fach-oo-uhs ]
/ ˈɪg nɪs ˈfætʃ u əs /
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noun, plural ig·nes fat·u·i [ig-neez -fach-oo-ahy]. /ˈɪg niz ˈfætʃ uˌaɪ/.

Also called friar's lantern, will-o'-the-wisp. a flitting phosphorescent light seen at night, chiefly over marshy ground, and believed to be due to spontaneous combustion of gas from decomposed organic matter.
something deluding or misleading.



In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.

Origin of ignis fatuus

1555–65; <Medieval Latin: literally, foolish fire
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for ignis fatuus

ignis fatuus
/ (ˈɪɡnɪs ˈfætjʊəs) /

noun plural ignes fatui (ˈɪɡniːz ˈfætjʊˌaɪ)

another name for will-o'-the-wisp
C16: from Medieval Latin, literally: foolish fire
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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