auroral chorus
n.— «Those sounds are now commonly known as atmospheric or natural radio, auroral chorus and VLF (“very low frequency” phenomena).» —“Guggenheim Scholar to Study Implications of ‘Atmospheric Radio’” UC Davis (California) Apr. 17, 2006. (source: Double-Tongued Dictionary)
Further reading
The autocomplete function on your phone comes in handy, of course. But is it changing the way we write and how linguists study language? Also, suppose you could invite any two authors, living or dead, to dinner. Who’s on your guest list and...
When you had sleepovers as a child, what did you call the makeshift beds you made on the floor? In some places, you call those bedclothes and blankets a pallet. This word comes from an old term for “straw.” And: What’s the story...