| aktinido |
actinide (A group of 15 radioactive elements some of which occur naturally while others are produced in nuclear reactions. They include plutonium, americium and neptunium. The health hazard presented by the actinides, if they are released into the environment, comes from the potency of their radioactive characteristics. They are alpha-emitters, and therefore can cause intense localized damage in tissues if absorbed into the body) |
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| aktinio |
actinium (A radioactive element of the actinide series, occurring as a decay product of uranium. It is used as an alpha particle source and in neutron production) |
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| akuaforte |
etching (The incision of lines on a plate of metal, glass, or other material by covering it with an acid-resistant coating, scratching through the coating, and then permitting an acid bath to erode exposed parts of the plate) |
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| akuifero |
aquifer (Layers of rock, sand or gravel that can absorb water and allow it to flow. An aquifer acts as a groundwater reservoir when the underlying rock is impermeable. This may be tapped by wells for domestic, agricultural or industrial use. A serious environmental problem arises when the aquifer is contaminated by the seepage of sewage or toxins from waste dumps. If the groundwater in coastal areas is over-used salt water can seep into the aquifer) |
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| akuikultura |
aquaculture (1. The cultivation and harvest of freshwater or marine animals and plants, in ponds, tanks, cages or on protected beds. This is usually done in inland waters, estuaries or coastal waters. It is estimated that commercial fish farming accounts for more than 10% of the world's fish needs. Fish farming usually concentrates on molluscs, including oysters, mussels and clams, because they are usually immobile and fetch high prices. Shrimps and salmon are also farmed, but the stock have to be caught in the wild first, so that they can be brought up to commercial standards in pens. Aquaculture in not new. In Asia freshwater fish have been farmed for some 4.000 years, usually on small farms. 2. The use of artificial means to increase the production of aquatic organisms in fresh or salt water) |
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| akuikulturaren ingurugiroaren gaineko er |
environmental impact of aquaculture (Fish farming pollutes the water with nutrients, methane and hydrogen sulphide which threaten both farmed fish and other marine life. Dangerous pesticides have been used to treat infestations of sea lice) |
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| akura |
lease (Any agreement which gives rise to relationship of landlord and tenant (real property) or lessor and lessee (real or personal property). Contract for exclusive possession of lands or tenements for determinate period. Contract for possession and profits of lands and tenements either for life, or for certain period of time, or during the pleasure of the parties) |
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| akustika |
acoustics (The science of the production, transmission and effects of sound) |
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| akzio publiko |
public action (A measure or provision taken on behalf and with the consent of the general populace) |
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| akzisa |
excise |
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| alarma |
alarm (Signalling an impending danger in order to call attention to some event or condition) |
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| albaitari-medikuntza |
veterinary medicine (The branch of medical practice which treats of the diseases and injuries of animals) |
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| albeolo |
alveolus (A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place. Also called air sac) |
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| albo-ondorio |
side effect (Any secondary effect, especially an undesirable one) |
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| aldaketa fisiko |
physical alteration (Any change in a body or substance that does not involve an alteration in its chemical composition) |
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| aldaketa teknologiko |
technological change (Changing of industrial methods by introducing new technology) |
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| aldakuntza urtarotar |
seasonal variation (In time series, that part of the movement which is assigned to the effect of the seasons on the year) |
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| alderantzizko osmosi |
reverse osmosis (A method of obtaining pure water from water containing a salt, as in desalination. Pure water and the salt water are separated by a semipermeable membrane and the pressure of the salt water is raised above the osmotic pressure, causing water from the brine to pass through the membrane into the pure water. This process requires a pressure of some 25 atmospheres, which makes it difficult to apply on a large scale) |
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| alderanzketa |
inversion (A reversal in the usual direction of a process, as in the change of density of water at 4° C) |
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| alderanzketa-geruza |
inversion layer (The atmosphere layer through which an inversion occurs) |
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