hole punch cloud
n.— «“Hole punch clouds,” also known as “fallstreak holes,” occur when patches of high cloud freeze and fall as ice crystals, leaving a dramatic gap behind.» —“Holes over Louisiana” Cloud Appreciation Society June 2, 2007. (source: Double-Tongued Dictionary)
Further reading
The word cloud comes from Old English clūd, meaning “rock” or “hill,” making it a relative of the word clod. The sense of a “hill” or “mass of rocks” was later applied to those vaporous hills in the sky. This is part of a complete episode...
In an article in The Atlantic magazine, humorist Mark Twain quoted a sing-songy bit of doggerel about conductors punching railroad fares that illustrates how colored paper has long been used to encode information. This is part of a complete episode...