Jisho

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Noun
1. green flash (optical phenomenon occurring shortly after sunset or before sunrise)
Wikipedia definition
2. Green flashGreen flashes and green rays are optical phenomena that occur shortly after sunset or before sunrise, when a green spot is visible, usually for no more than a second or two, above the sun, or it may resemble a green ray shooting up from the sunset point. Green flashes are a group of phenomena stemming from different causes, and some are more common than others. Green flashes may be observed from any altitude (even from an aircraft).
Read “Green flash” on English Wikipedia
Read “グリーンフラッシュ” on Japanese Wikipedia
Read “Green flash” on DBpedia
Other forms
グリーン・フラッシュ

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