bul: полярно сияние

Information
has URI	http://lexvo.org/id/term/bul/%D0%BF%D0%BE%D0%BB%D1%8F%D1%80%D0%BD%D0%BE%20%D1%81%D0%B8%D1%8F%D0%BD%D0%B8%D0%B5

Meaning
means	(noun) an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force aurora