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| Terms for subject Environment (5171 entries) |
| dal | valley (Any low-lying land bordered by higher ground; especially an elongate, relatively large, gently sloping depression of the Earth's surface, commonly situated between two mountains or between ranges of hills or mountains, and often containing a stream with an outlet. It is usually developed by stream erosion, but may be formed by faulting) | |
| dalgryte | geographic cirque (A deep steep-walled half-bowl-like recess or hollow, variously described as horseshoe- or crescent-shaped or semi-circular in plan, situated high on the side of a mountain and commonly at the head of a glacial valley and produced by the erosive activity of a mountain glacier. It often contains a small round lake, and it may or may not be occupied by ice or snow) | |
| dam | dam (Structure constructed across a watercourse or stream channel) | |
| damdrenering | dam draining (The drawing of water from a reservoir by means of draining pipes located at the bottom of the basin and controlled by a system of sluices which ensure, if necessary, the emptying of the basin in a given period of time in respect of downstream conditions) | |
| damp | fume (Solids in the air that have been generated by the condensation of vapors, chemical reactions or sublimation (a direct change from solid to gas). Often metallic oxides or metals, these particles are less than 1 micrometer in diameter and may be toxic) | |
| dampgenerator | steam generator (A pressurized system in which water is vaporized to steam by heat transferred from a source of higher temperature, usually the products of combustion from burning fuels. Also known as steam boiler) | |
| damptrykk | vapour pressure (The partial pressure of water vapour in the atmosphere. For a liquid or solid, the pressure of the vapour in equilibrium with the liquid or solid) | |
| data per hode | per capita data (No definition needed) | |
| dataanalyse | data analysis (The evaluation of digital data, i.e. data represented by a sequence of code characters) | |
| databærer | data carrier (A medium on which data can be recorded, and which is usually easily transportable, such as cards, tape, paper, or disks) | |
| database | data base (A computerized compilation of data, facts and records that is organized for convenient access, management and updating) | |
| datainnsamling | data acquisition (The act of collecting and gathering individual facts, statistics or other items of information) | |
| dataregistreringsteknikk | data recording technique (The body of specialized procedures and methods used for the preservation, collocation or registration of individual elements of information) | |
| datasenter | data centre (An organization established primarily to acquire, analyze, process, store, retrieve, and disseminate one or more types of data) | |
| datasikring | data protection (Policies, procedures or devices designed to maintain the integrity or security of informational elements in storage or in transmission) | |
| datasystem | data processing system (An assembly of computer hardware, firmware and software configured for the purpose of performing various operations on digital information elements with a minimum of human intervention) | |
| datautveksling | data exchange (A reciprocal transfer of individual facts, statistics or items of information between two or more parties for the purpose of enhancing knowledge of the participants) | |
| datering | dating (Any of several techniques such as radioactive dating, dendrochronology, or varve dating, for establishing the age of rocks, palaeontological or archaeological specimens, etc.) | |
| DDT | 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) | |
| decibel | decibel (A unit used to express relative difference on power, usually between acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two level) |