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| Terms for subject Environment (6972 entries) |
| hurricane (A tropical cyclone of great intensity; any wind reaching a speed of more than 73 miles per hour (117 kilometers per hour) is said to have hurricane force) | orkaan | |
| hybridization (The act or process of producing hybrids that is an animal or plant resulting from a cross between genetically unlike individuals. Hybrids between different species are usually sterile) | hübridiseerimine | |
| hydraulic construction (Any structure built to route the flow of water, or to support the weight and pressure of a body of water) | vesiehitis | |
| hydraulic engineering (A branch of civil engineering concerned with the design, erection, and construction of sewage disposal plants, waterworks, dams, water-operated power plants and such) | vesiehitus | |
| hydraulics (The branch of science and technology concerned with the mechanics of fluids, especially liquids) | hüdraulika | |
| hydrobiology (Study of organisms living in water) | hüdrobioloogia | |
| hydrocarbon (A very large group of chemical compounds composed only of carbon and hydrogen) | süsivesinik | |
| hydrocarbon storage tank (A container or a reservoir for the storage of hydrocarbons) | süsivesinikumahuti | |
| hydrochloric acid (A solution of hydrogen chloride gas in water; a poisonous, pungent liquid forming a constant-boiling mixture at 20% concentration in water; widely used as a reagent, in organic synthesis, in acidizing oil wells, ore reduction, food processing, and metal cleaning and pickling. Also known as muriatic acid, HCl) | soolhape | |
| hydrochlorofluorocarbon | osaliselt halogeenitud klorofluorosüsivesinikud | |
| hydrochlorofluorocarbon-22 | klorodifluorometaan | |
| hydroculture (Growing plants without soil but in sand or vermiculite or other granular material, using a liquid solution of nutrients to feed them) | hüdropoonika | |
| hydroelectric energy (The free renewable source of energy provided by falling water that drives the turbines. Hydropower is the most important of the regenerable energy sources because of its highest efficiency at the energy conversion. There are two types of hydroelectric power plants: 1. run-of-river power plants for the use of affluent water; 2. storage power plants (power stations with reservoir) where the influx can be regulated with the help of a reservoir. Mostly greater differences in altitudes are being used, like mountain creeks. Power stations with reservoirs are generally marked by barrages with earth fill dam or concrete dams. Though hydropower generally can be called environmentally acceptable, there exist also some problems: 1. change of groundwater level and fill up of the river bed with rubble. 2. Risk of dam breaks. 3. Great demand for land space for the reservoir. 4. Diminution, but partly also increase of value of recreation areas. As the hydropowers of the world are limited,the world energy demand however is rising, finally the share of hydropower will decrease) | hüdroelektrienergia | |
| hydroelectric power plant (Power station which operates with the free renewable source of energy provided by falling water) | hüdroelektrijaam | |
| hydrofluorocarbon | osaliselt halogeenitud fluorosüsivesinik | |
| hydrofluorocarbon | fluorosüsivesinik | |
| hydrofluorocarbon-23 | trifluorometaan | |
| hydrogen (A flammable colourless gas that is the lightest and most abundant element in the universe. It occurs mainly in water and in most organic compounds and is used in the production of ammonia and other chemicals, in the hydrogenation of fats and oils, and in welding) | vesinik | |
| hydrogen sulphide (Flammable, poisonous gas with characteristic odour of rotten eggs, perceptible in air in a dilution of 0.002 mg/l. It is used as a reagent in chemical analysis; extremely hazardous; collapse, coma and death from respiratory failure may come within a few seconds after one or two inspirations; low concentrations produce irritation of conjunctiva and mucous membranes. Headache, dizziness, nausea, lassitude may appear after exposure, H2S) | väävelvesinik | |
| hydrogen system | vesinikusüsteem |