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أ ٌ ْ ھ ـ ٕ ء ة ى ء غ ظ ض ذ خ ث ت ش ر ق ص ف ع س ن م ل ك ي ط ح ز ئ و ه د ج ب ا آ ی پ ڥ چ گ ڨ ڭ ݣ << >>
| Terms for subject Environment (5878 entries) |
| دواء مستبعد | discarded medicinal drug | |
| دواجن | poultry (Domesticated fowl grown for their meat and eggs) | |
| دواخل المدينة | inner city (1. Part of a city at or near the centre, especially a slum area where poor people live in bad housing. 2. City centres of many industrialized countries which exhibit environmental degradation. The numerous and highly competitive activities entailing land use overwhelm the limited space and create a situation of overcrowding, functional incompatibility and cultural degradation. Inner city areas have a high level of commercial specialization, a large number of offices and a sizeable daytime population. At the same time, city centres generally remain a sort of ghetto for a permanent, low-income population living in run-down housing and enjoying little in the way of public services and civic amenities. The concentration of service industries inevitably entails the replacement of traditional housing and shops by office blocks, the provision of basic utilities at the expense of civic amenities and the provision of major access roads which eat up urban space. Structures of historic originareoften unable to meet modern requirements and, notwithstanding their value, frequently face demolition) | |
| دودة الأرض | earthworm (Any of numerous oligochaete worms of the genera Lumbricus, Allolobophora, Eisenia, etc., which burrow in the soil and help aerate and break up the ground) | |
| دورة التغذية | nutrient cycle (A biogeochemical cycle, in which inorganic nutrients move through the soil, living organisms, air and water or through some of these) | |
| دورة الكربون | carbon cycle (The cycle of carbon in the biosphere, in which plants convert carbon dioxide to organic compounds that are consumed by plants and animals, and the carbon is returned to the biosphere in inorganic form by processes of respiration and decay) | |
| دورة النيتروجين | nitrogen cycle (The complex set of processes by which crops acquire the large amount of nitrogen they need to make proteins, nucleic acids and other biochemicals of which they are composed, and how the nitrogen returns to the atmosphere) | |
| دورة حياة المادة | material life cycle (All the stages involved in the manufacturing, distribution and retail, use and re-use and maintenance, recycling and waste management of materials) | |
| دورة حياة المنتَج | product life cycle (A product life cycle includes the following phases: acquisition of raw materials, production, packaging, distribution, use, recyling, and disposal) | |
| دولة | county (An area comprising more than one city and whose boundaries have been designed according to some biological, political, administrative, economic, demographic criteria) | |
| دولة متقدمة | developed country (A nation possessing a relatively high degree of industrialization, infrastructure and other capital investment, sophisticated technology, widespread literacy and advanced living standards among its populations as a whole) | |
| دولة نامية | developing country (A country whose people are beginning to utilize available resources in order to bring about a sustained increase in per capita production of goods and services) | |
| دي دي تي | DDT (A persistent organochlorine insecticide, also known as dichlorodiphenyltrichloroethane, that was introduced in the 1940s and used widely because of its persistence (meaning repeated applications were unnecessary), its low toxicity to mammals and its simplicity and cheapness of manufacture. It became dispersed all over the world and, with other organochlorines, had a disruptive effect on species high in food chains, especially on the breeding success of certain predatory birds. DDT is very stable, relatively insoluble in water, but highly soluble in fats. Health effects on humans are not clear, but it is less toxic than related compounds. It is poisonous to other vertebrates, especially fish, and is stored in the fatty tissue of animals as sublethal amounts of the less toxic DDE. Because of its effects on wildlife its use in most countries is now forbidden or strictly limited) | |
| ديرمابترا | dermapteran | |
| ديمقراطية | democracy (A system of governance in which ultimate authority power is vested in the people and exercised directly by them or by their freely elected agents) | |
| ديمومة البيئة | environmental durability | |
| دين | debt (Something owed to someone else) | |
| دين - ديانة | religion (The expression of man's belief in and reverence for a superhuman power recognized as the creator and governor of the universe) | |
| ديناميات السكان | population dynamics (The process of numerical and structural change within populations resulting from births, deaths, and movements) | |
| ديوكسين | dioxin (A by-product formed during the preparation of the herbicide 2, 4, 5-T, and sometimes produced by the incineration of chlorinated organic compounds. It may also occur naturally and is distributed widely in the environment, except locally in extremely low concentrations. Substantial amounts were released by the industrial accident of Seveso in 1976) |