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| ig·nis fat·u·us [ ìgniss fáchoo əss ] (plural ig·nes fa·tu·i [ ìgneez fáchoo ]) |
noun |
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| Definition: |
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1. science
Same as will-o'-the-wisp (sense 1)
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2. illusory thing: something such as a hope or an aim that proves illusory or leads somebody astray
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literary
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| [< Latin, "foolish fire"; from its erratic movements] |
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