- 1捲雲
Cirrus is a kind of cloud, very high in the sky, light and thin, shaped like feathers or wisps of white hair. Up there the air is so cold that the cloud is made of ice, not of water drops. Cirrus by itself does not usually mean a over your head. Though actually, when more and more of it spreads across a clear sky, it can be an early sign that the weather is about to change. The name is a learned borrowing from Latin cirrus, “a curl, a fringe, a horse’s forelock.” A British chemist and cloud-watcher, Luke Howard, gave this cloud type its name in 1803; he wanted clouds to have clear Latin names, the way plants do, and scientists still use his names. The careful plural is cirri, also from Latin, though people also say cirrus clouds. Latin cirrus can also mean a curl or tendril on a plant or animal, but the sense here is the high feather-cloud.
組成Learned borrowing from Latin cirrus, “curl; fringe of clothes; a horse’s forelock.” Further origin unknown. The cloud sense was coined by Luke Howard in 1803. The plural cirri is from Latin cirrī.
同家族的字
- cirrocumulusa high cloud that mixes the look of cirrus with small heaped clumps
- cirrostratusa high, thin sheet of cirrus-like cloud that can veil the whole sky
原始詞典資料5 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
cirrusnoun/ˈsɪɹəs/
- 1
biologybotanynatural-sciencesSynonym of tendril (“a thin, spirally coiling stem that attaches a plant to its support”).
- Cirri are taken for thoſe fine Strings, or Hairs, by vvhich ſome Plants faſten themſelves, in order to their Support in creeping along; as Ivy, &c.
- 2
biologynatural-scienceszoologyA thin tendril-like appendage, such as a barbel (“whisker-like sensory organ around the mouth”) of some fish, a cilium of some species of protists, or a foot of some crustaceans of the infraclass Cirripedia.
- Each foot is divided into two parts, one dorsal, the other ventral, and each part has a bundle of subulate bristles and a cirrus.
- All creatures which have their skins protected, whether by feathers, or shells, or scales, have an exquisite touch in their mouth, or in the appendages which hang from it. Fishes have cirri which hang from their mouth, and these are equivalent to the feelers or tentacula of insects and crustaceans.
- 3
obsoletebiologynatural-sciencesornithologyA tuft of ornamental feathers.
- 4
obsoletebiologynatural-sciencesornithologyA long, thin, wirelike tail feather.
- 5
climatologymeteorologynatural-sciencesA principal high-level type of cloud, typically composed of thin, delicate, white filaments or wisps, or narrow bands.
- [page 99] Cirrus. […] Parallel, flexuous, or diverging fibres, extensible in any or in all directions. […] [page 100] In fair weather, with light variable breezes, the sky is seldom quite clear of small groups of the oblique cirrus, which frequently come on from the leeward, and the direction of their increase is to windward.
- Cirrus clouds moving from the southwest indicate falling temperature; moving from the northwest they indicate the probability of rising temperature. They are the mares' tales and cattails of sailors' cant. Near the horizon, cirrus clouds may have a stratiform appearance.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。