Cloud

In meteorology, a cloud is an aerosol comprising a visible mass of liquid droplets or frozen crystals made of water or various chemicals. The droplets or particles are suspended in the atmosphere above the surface of a planetary body. On Earth clouds are formed by the saturation of air in the homosphere when air cools or gains water vapor.

Cloud types in the troposphere, the atmospheric layer closest to Earth's surface, have Latin names due to the universal adaptation of Luke Howard's nomenclature. It was formally proposed in December 1802 and published for the first time the following year. It became the basis of a modern international system that classifies these tropospheric aerosols into several physical forms which can be found at various altitude levels or étages.

Derek

Derek is a male name. It is the English language short form of Dederik, the Low German form of the name Theodoric. Theodoric is an old Germanic name with an original meaning of "people-ruler".

Common variants of the name are Derrek, Derick and Derrick, more rarely also Deryck or 'Derrok'. The Dutch language short form of the same Low German / Low Franconian name is Dirk (popularised by the actor Dirk Bogarde) and the Low German Di(e)rk (Dierk Hoff).

History

The English form of the name arises in the 15th century, via import from the Low Countries. The native English (Anglo-Saxon) form of the name was Deoric or Deodric, from Old English Þēodrīc, but this name had fallen out of use in the medieval period. During the Late Middle Ages, there was intense contact between the territories adjacent to the North Sea, in particular due to the activities of the Hanseatic League. As a result, there was a lot of cross-pollination between Low German, Dutch, English, Danish and Norwegian. The given name Derk is found in records of the Low Countries from the early 14th century, and in the spelling Derck becomes rather common in name lists compiled in the Habsburg Netherlands during the early 16th century. An early bearer of the name Derek was lord of Keppel, Gelderland, in the early 14th century. A Derek van Keppel, lord of Verwoelde, died in 1495 and was succeeded by his eldest son, also called Derek van Keppel. A later Derek van Keppel died in 1646, succeeded by Asewolt van Keppel, the father of Arnold van Keppel, who in 1688 was created Earl of Albemarle in the Peerage of England.