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| Terms for subject Environment (5878 entries) |
| ocean temperature (A measure, referenced to a standard value, of the heat or coldness in a body of oceanic water) | درجة حرارة المحيط | |
| ocean-air interface (The sea and the atmosphere are fluids in contact with one another, but in different energy states - the liquid and the gaseous. The free surface boundary between them inhibits, but by no means totally prevents, exchange of mass and energy between the two. Almost all interchanges across this boundary occur most effectively when turbulent conditions prevail. A roughened sea surface, large differences in properties between the water and the air, or an unstable air column that facilitates the transport of air volumes from sea surface to high in the atmosphere. Both heat and water (vapor) tend to migrate across the boundary in the direction from sea to air. Heat is exchanged by three processes: radiation, conduction, and evaporation. The largest net exchange is through evaporation, the process of transferring water from sea to air by vaporization of the water) | نقطة التقاء ماء البحر بالهواء | |
| Oceania (The islands of the southern, western and central Pacific Ocean, including Melanesia, Micronesia, and Polynesia. The term is sometimes extended to encompass Australia, New Zealand, and the Malay Archipelago) | أوقيانيا | |
| oceanic climate (A regional climate which is under the predominant influence of the sea, that is, a climate characterized by oceanity; the antithesis of a continental climate) | مناخ المحيطات | |
| oceanography (The scientific study and exploration of the oceans and seas in all their aspects) | علم المحيطات | |
| odonate | الرعَّاشات | |
| odour (The property of a substance affecting the sense of smell; any smell; scent; perfume) | رائحة | |
| odour nuisance | رائحة كريهة | |
| off-peak commuting (Traveling back and forth regularly over some distance, outside of the hours of maximum traffic frequency) | السفر للعمل في غير ساعات الذروة | |
| off-peak travelling (Relating to travelling outside rush-hours to avoid overcrowding in public means of transport) | السفر في غير ساعات الذروة | |
| off-peak working | العمل في غير ساعات الذروة | |
| off-site (Activities taking place or located away from the site) | خارج الموقع | |
| offence against the environment (Unlawful acts against the environment, such as water contamination, hazardous waste disposal, air contamination, unpermitted installation of plants, oil spills, etc.) | اعتداء على البيئة | |
| office (Any room, set of rooms or building used for the administration of government service, business transactions or other work related activities) | مكتب | |
| official duty | واجب رسمي | |
| official hearing (Proceedings of relative formality, with definite issues of fact or of law to be tried, in which witnesses are heard and parties proceeded against have right to be heard) | استماع رسمي | |
| offset policy (emissions trading, Policy whereby emissions from a proposed new or modified stationary source are balanced by reductions from existing sources to stabilise total emissions) | سياسة التعويض | |
| offshore mining (Oil extraction from platforms situated a short distance from the coast) | التعدين في البحر | |
| offshore oil drilling (The act or process of extracting petroleum from deposits underlying the floor of the ocean or some other large body of water) | استخراج النفط من البحر | |
| oil and fat industry (Industry for the production and processing of edible oils and fats) | صناعة الزيوت والدهون |