Jisho

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Noun
1. rainbow
Wikipedia definition
2. RainbowA rainbow is an optical and meteorological phenomenon that causes a spectrum of light to appear in the sky when the Sun shines on to droplets of moisture in the Earth's atmosphere. It takes the form of a multicoloured arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun. In a "primary rainbow", the arc shows red on the outer part, and violet on the inner side.
Read “Rainbow” on English Wikipedia
Read “虹” on Japanese Wikipedia
Read “Rainbow” on DBpedia
Other forms
霓 【にじ】
Notes
霓: Rarely-used kanji form.

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