Jisho

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Noun
1. mayfly; ephemeropteranUsually written using kana alone
Noun
2. ephemerality (of human life)Usually written using kana alone
Noun
3. dragonfly; damselflyArchaism, Usually written using kana alone, Only applies to かげろう, See also 蜻蛉 とんぼ
Other forms
蜉蝣 【ふゆう】カゲロウ

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