fog bow; white rainbow
A meteorological phenomenon similar to a rainbow but appearing as a white arc in fog, due to very small water droplets. The reading むこう is rare and may be encountered in older or specialized texts.
I saw a rare fog bow at the mountain summit.
A fog bow is paler in color than a regular rainbow.
Standard kanji spelling for the meteorological phenomenon.
Compound of 霧 (きり, 'fog') and 虹 (にじ, 'rainbow'). The reading むこう is a less common variant, possibly from an older or dialectal reading of the characters.