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Why Do Types of Cloud Have 'Double-Barreled' Names Like 'Cirrus uncinus'?

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Edited by Richard Walker, Saturday 5 September 2026 at 20:53

My brother snapped these Mares' Tails, high altitude (20,000 feet and counting) ice crystal clouds. Their meteorological  name is Cirrus uncinus, which apparently means 'curly hooks'. 

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It's interesting that different kinds of cloud have double-barrelled 'binomial' names with a genus and a species, a form generally kept for living things. But (thanks Gemini!) I found that viruses have binomial names too, although whether viruses are alive is debatable.

Karl Linnaeus, whose influence is pne of the main reasons binomial names are used in biology. even explored a similar naming scheme for minerals, considered by him a third 'kingdom' (and we still speak of 'Animal, Vegetable and Mineral') but ultimately it was not adopted by the scientific world.

Clouds are an exception amongst non-animate entities: Luke Howard who at the beginning of the 19th century famously pioneered assigning systematic names to cloud forms imitated Linnaeus in using binomial names and his scheme has survived.

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