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
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Have you ever googled your own name and found someone else who goes by the very same moniker? There’s a word for that: googleganger. Plus, the language of hobbyists and enthusiasts: If you’re a beekeeper, perhaps you call yourself a...