AskDefine | Define oasis

Dictionary Definition

oasis

Noun

1 a fertile tract in a desert (where the water table approaches the surface)
2 a shelter serving as a place of safety or sanctuary [syn: haven] [also: oases (pl)]

User Contributed Dictionary

English

Etymology

From ὄασις, from Egyptian

Pronunciation

Noun

  1. A well surrounded by vegetation in a desert.
  2. A quiet, peaceful place surrounded by busy or noisy places
    The park was an oasis in the middle of the busy city

Synonyms

Translations

A well surrounded by vegetation in a desert
a peaceful place surrounded by busy or noisy places

Extensive Definition

In geography, an oasis (plural: oases) is an isolated area of vegetation in a desert, typically surrounding a spring or similar water source. Oases also provide habitat for animals and even humans if the area is big enough. The location of oases has been of critical importance for trade and transportation routes in desert areas. Caravans must travel via oases so that supplies of water and food can be replenished. Thus, political or military control of an oasis has in many cases meant control of trade on a particular route. For example, the oases of Awjila, Ghadames and Kufra, situated in modern-day Libya, have at various times been vital to both North-South and East-West trade in the Sahara desert. The word oasis came into English via Greek ὄασις oasis, borrowed directly from Egyptian wḥ3t or Demotic wḥỉ. It was not borrowed from Coptic ouaḥe (*/waħe/), as is sometimes suggested; the Greek word is attested several centuries before Coptic existed as a written language.
Oases are formed from underground rivers or aquifers such as the Artesian aquifer, where water can reach the surface naturally by pressure or by man made wells. Occasional brief thunderstorms provide subterranean water to sustain natural oases, such as the Tuat. Substrata of impermeable rock and stone can trap water and retain it in pockets; or on long faulting subsurface ridges or volcanic dikes water can collect and percolate to the surface. Any incidence of water is then used by migrating birds who also pass seeds with their droppings which will grow at the waters edge forming an oasis.

Growing plants

People who live in an oasis use every bit of land. Water has to be used carefully; the fields must be irrigated to grow plants like dates, figs, olives, and apricots. The most important plant in an oasis is the date palm which forms the upper layer. These palm trees provide shade for smaller trees like peach trees, which form the middle layer. Plants like potatoes, onions, carrots, and other vegetables form the lowest layer. The date palms do more than protect other plants from the burning sun - all parts of an oasis are very important for the people. By growing plants in different layers, the farmers make best use of the soil and water.

Notable oases

Bibliography

External links

oasis in Arabic: واحة
oasis in Bosnian: Oaza
oasis in Bulgarian: Оазис
oasis in Catalan: Oasi
oasis in Czech: Oáza
oasis in Welsh: Gwerddon
oasis in Danish: Oase
oasis in German: Oase
oasis in Estonian: Oaas
oasis in Spanish: Oasis
oasis in Esperanto: Oazo
oasis in Basque: Oasi
oasis in Persian: واحه
oasis in French: Oasis
oasis in Korean: 오아시스
oasis in Croatian: Oaza
oasis in Indonesian: Oasis
oasis in Italian: Oasi
oasis in Hebrew: נווה מדבר
oasis in Georgian: ოაზისი
oasis in Latin: Oasis
oasis in Lithuanian: Oazė
oasis in Malayalam: മരുപ്പച്ച
oasis in Dutch: Oase
oasis in Japanese: オアシス
oasis in Norwegian: Oase
oasis in Polish: Oaza (geografia)
oasis in Portuguese: Oásis
oasis in Romanian: Oază
oasis in Russian: Оазис
oasis in Simple English: Oasis
oasis in Slovak: Oáza
oasis in Serbian: Оаза
oasis in Finnish: Keidas
oasis in Swedish: Oas
oasis in Thai: โอเอซิส
oasis in Vietnamese: Ốc đảo
oasis in Turkish: Vaha
oasis in Ukrainian: Оазис
oasis in Chinese: 綠洲
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