- 1積雲
Cumulus is a kind of cloud: thick, white, and puffy, with a flat bottom and a top, like a heap of cotton or cauliflower. On a fair day you see them sitting separately in a blue sky. The Latin word meant a heap or a pile, which is exactly how they look. A British chemist, Luke Howard, gave clouds these Latin names in 1803, and weather people still use his system. Small friendly heaps are fair-weather cumulus; if they grow tall and dark they can turn into cumulonimbus, the . Scientists and weather reports use the word; everyday people more often just say "fluffy clouds". Though actually, in older Latin cumulus was any heap, not only a cloud — the cloud sense is the one English meet.
組成Learned borrowing from Latin cumulus, "heap, pile". Doublet of French comble. The cloud sense was coined by Luke Howard in 1803.
同家族的字
- accumulatefrom Latin accumulare, "to heap up", built on cumulus
- cumulativethe same Latin heap: adding up into a pile
原始詞典資料2 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。
cumulusnoun/ˈkjuːmjʊləs/
- 1
A heap or mound.
- 2
climatologymeteorologynatural-sciencesA large white, puffy cloud that develops through convection.
- [page 99] Cumulus. […] Convex or conical heaps, increasing upward from a horizontal base. […] [page 101] The cumulus of fair weather has a moderate elevation and extent, and a well defined rounded surface. Previous to rain it increases more rapidly, appears lower in the atmosphere, and with its surface full of loose fleeces or protuberances.
- In the sketch (which is taken about 75 Jovian days after that of the 2nd July) there is shown a dark copper-coloured streak along the southern margin of the south brown belt, butting on to a bluff-headed streak of cumulus cloud which may be the same remarkable bluff head noticed on July 2.
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。