| overhead power line (Suspended cables by which electrical power is distributed throughout a country) |
aireko linea elektriko |
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| overpopulation (A population density that exceeds the capacity of the environment to supply the health requirements of the individual organism) |
superpopulazio |
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| overturn (The circulation, especially in the fall and spring, of the layers of water in a lake or sea, whereby surface water sinks and mixes with bottom water; it is caused by changes in density differences due to changes in temperature, and is especially common wherever lakes are icebound in winter; limnology) |
iraulketa |
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| overwintering (To spend winter in a particular place) |
hibernatze |
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| ovine (Horned ruminant mammals raised in many breeds for wool, edible flesh, or skin) |
ardi-azienda |
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| oxidation (A chemical reaction that increases the oxygen content of a compound) |
oxidazio |
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| oxidation-reduction (An oxidizing chemical change, where an element's positive valence is increased (electron loss), accompanied by a simultaneous reduction of an associated element (electron gain)) |
oxidazio-erredukzio |
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| oxide (Binary chemical compound in which oxygen is combined with a metal or nonmetal) |
oxido |
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| oxidising agent (Compound that gives up oxygen easily, removes hydrogen from another compound, or attracts negative electrons) |
oxidatzaile |
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| oxidising agent (Compound that gives up oxygen easily, removes hydrogen from another compound, or attracts negative electrons) |
agente oxidatzaile |
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| oxidizable material (Substance that can undergo a chemical reaction with oxygen) |
material oxidagarri |
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| oxygen (A gaseous chemical element; an essential element in cellular respiration and in combustion processes; the most abundant element in the earth's crust and about 20% of the air by volume) |
oxigeno |
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| oxygen content (Amount of oxygen contained in a solution) |
oxigeno-eduki |
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| oxygen deficiency (No definition needed) |
oxigeno-falta |
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| oxygenation (Treating with oxygen) |
oxigenazio |
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| oyster farming (There are two types of oyster farming: suspension culture, in which oysters are grown off bottom, in floating trays, is a labor-intensive form of cultivation that requires continuous tending and cleaning of both gear and shellfish, and bottom culture, which is similar to conventional crop farming on land; it involves selecting areas of the sea floor that provide a natural food supply, necessary currents, minimum exposure to predators, and proper temperature and then "seeding" the bottom with shellfish stock that are left to grow to market size. Then they are harvested with a bottom drag from a boat. Both suspension culture and bottom culture depend on natural food supplies for growing the shellfish being raised) |
ostra-hazkuntza |
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| ozone (An allotropic form of oxygen containing three atoms in the molecule. It is a bluish gas, very active chemically, and a powerful oxidizing agent. Ozone is formed when oxygen or air is subjected to a silent electric discharge. It occurs in ordinary air in very small amounts only) |
ozono |
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| ozone depletion potential (A factor that reflects the ozone depletion potential of a substance, on a mass per kilogram basis, as compared to chlorofluorocarbon-11 (CFC-11). Such factor shall be based upon the substance's atmospheric life time, the molecular weight of bromine and chlorine, and the substance's ability to be photolytically disassociated, and upon other factors determined to be an accurate measure of relative ozone depletion potential) |
ozonoa urritzeko ahalmen |
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| ozone layer (The general stratum of the upper atmosphere in which there is an appreciable ozone concentration and in which ozone plays an important part in the radiative balance of the atmosphere) |
ozonosfera |
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| ozone layer depletion (The fragile shield of ozone is been damaged by chemicals released on earth. The main chemicals that are depleting stratospheric ozone are chlorofluorocarbons which are used in refrigerators, aerosols, and as cleaners in many industries, and halons, which are used in fire extinguishers. The damage is caused when these chemicals release highly reactive forms of chlorine and bromine. Over the past 30 years ozone levels over parts of Antarctica have dropped by almost 40% during some months and a "hole" in ozone concentrations is clearly visible in satellite observations) |
ozonosferaren urritze |
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