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lysis long-range adjective referring to a weather forecast that covers a period more than five days ahead longshore adjective referring to a current which flows along the length of a shore long-term adjective lasting for a long time O the long-term effects of grazing long ton noun same as ton 1 looping noun a situation in which a column of smoke from a tall chimney is brought down to ground level by air currents and then rises again loss noun the state of not having something any more, or of having less of something O loss of control O the loss of natural habitats O loss of amenity value O hearing loss from noisy working conditions lotic adjective referring to ecological communities that live in water that flows quickly Lotka-Volterra predator-prey model noun a simple mathematical model representing the interaction between predators and their prey lough noun (in Ireland) a lake louse noun a small wingless insect that sucks blood and lives on the skin as a parasite on animals and humans. There are several types, the commonest being body louse, crab louse and head louse. Some diseases can be transmitted by lice. Genus: Pediculus. (note: The plural is lice.) low adjective near the bottom or towards the bottom ■ noun same as depression 1 O A series of lows are crossing the North Atlantic towards Ireland. low-emission vehicle noun a vehicle which does not emit much pollution when compared to vehicles with conventional internal combustion engines. Abbr LEV lower verb 1. to put something in a lower position O lower the barrier 2. to reduce something in amount or intensity O lowered the temperature O lower the pressure lower plants plural noun organisms traditionally classed as plants but which do not have a vascular system, e.g. mosses low-grade adjective not of high quality low input farming, lower input farming noun a system of farming based on restricted use of chemical fertilisers, pesticides and herbicides lowland noun an area of low-lying land as opposed to hills and mountains or highlands low-level radioactive waste, low-level waste noun waste which is only slightly radioactive and does not cause problems for disposal low production volume chemical noun a chemical of which 10-1000 tonnes is sold per year per manufacturer or importer low tide noun the point when the sea level at the coast is lowest low-waste technology noun efficient technology which produces little waste LPG abbr liquefied petroleum gas LPV chemical abbr low production volume chemical Lr symbol lawrencium lucerne noun a perennial, drought-resistant, leguminous plant that is rich in protein. It is mainly used either for green feed for animals or for hay or silage. Latin name: Medicago sativa. (note: The US name is alfalfa.)

lumber noun (in the USA and Canada) trees which have been cut down lumberjack noun (in the USA and Canada) a person whose job is to cut down trees lunar adjective referring to the moon lunar eclipse noun a situation when the Earth passes between the Sun and the Moon causing the shadow of the Earth to fall across the Moon, so cutting off its light. Compare solar eclipse lunar phase noun a change in the appearance of the Moon as it moves from new to full and back again every 29 days (note: The phases are: new moon, first quarter, full moon and last quarter.) lung noun the organ of respiration of vertebrates that breathe air lush adjective referring to vegetation which is thick and green O Lush tropical vegetation rapidly covered the clearing. lux noun an SI unit of brightness of light shining on a surface. Symbol lx LWR abbr light water reactor lyophilise verb to preserve food by freezing it rapidly and drying in a vacuum lysimeter noun a device used for measuring the rate of drainage of water through soil and the soluble particles removed in the process lysis noun the destruction of a cell by disrupting its outer membrane, allowing the cell contents to escape

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