JMdict: 1536700

夜光 【やこう】

  1. [n,adj-no] nocturnal luminescence; noctilucence
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Kanji in this word:

Kanji Meanings On Readings Kun Readings Grade
夜 Night, Evening ヤ よ, よる 2
光 Ray, Light コウ ひか.る, ひかり 2