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Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. You can also try the grid of 16 letters. Letters must be adjacent and longer words score better. See if you can get into the grid Hall of Fame !
Change the target language to find translations.
Tips: browse the semantic fields (see From ideas to words) in two languages to learn more.
1.the trees and other plants in a large densely wooded area
2.land that is covered with trees and shrubs
1.establish a forest on previously unforested land"afforest the mountains"
1.the science of planting and caring for forests and the management of growing timber
ForestFor"est (?), n. [OF. forest, F. forêt, LL. forestis, also, forestus, forestum, foresta, prop., open ground reserved for the chase, fr. L. foris, foras, out of doors, abroad. See Foreign.]
1. An extensive wood; a large tract of land covered with trees; in the United States, a wood of native growth, or a tract of woodland which has never been cultivated.
2. (Eng. Law) A large extent or precinct of country, generally waste and woody, belonging to the sovereign, set apart for the keeping of game for his use, not inclosed, but distinguished by certain limits, and protected by certain laws, courts, and officers of its own. Burrill.
ForestFor"est, a. Of or pertaining to a forest; sylvan.
Forest fly. (Zoöl.) (a) One of numerous species of blood-sucking flies, of the family Tabanidæ, which attack both men and beasts. See Horse fly. (b) A fly of the genus Hippobosca, esp. H. equina. See Horse tick. -- Forest glade, a grassy space in a forest. Thomson. -- Forest laws, laws for the protection of game, preservation of timber, etc., in forests. -- Forest tree, a tree of the forest, especially a timber tree, as distinguished from a fruit tree.
ForestFor"est, v. t. To cover with trees or wood.
Argonne Forest • Barmah forest virus • Black Forest • De Forest • Finnish forest reindeer • Forest Brand of Ajmaline • Forest Brand of Carisoprodol • Forest Brand of Levothyroxine Sodium • Forest Brand of Rimantadine Hydrochloride • Kyasanur Forest Disease • Kyasanur Forest disease • Kyasanur Forest disease virus • Lee De Forest • Mediterranean forest • New Forest • Petrified Forest National Park • Semliki forest virus • Sherwood Forest • boreal forest • broad-leaved forest • classified forest • coniferous forest • deciduous forest • fir forest • flame of the forest • forest certification • forest conservation • forest fire • forest fire fighter • forest goat • forest god • forest path • forest plantation • forest ranger • forest red gum • forest tent caterpillar • forest track • giant forest pig • high forest • natural forest • primaeval forest • primeval forest • private forest • publicly-owned forest • rain forest • riparian forest • sustainable forest management • temperate forest • temperate rain forest • tropical forest • tropical rain forest • virgin forest • walk in the forest
Mediterranean forest • boreal forest • classified forest • forest certification • forest conservation • forest plantation • forest ranger • high forest • natural forest • private forest • publicly-owned forest • sustainable forest management • temperate forest • tropical forest
A Forest • Alishan Forest Railway • Amazonian forest • Apalachicola National Forest • Arapahoe National Forest • Ashdown Forest • Ashurst (New Forest) railway station • Battle of Hürtgen Forest • Battle of the Teutoburg Forest • Bavarian Forest • Beaverhead-Deerlodge National Forest • Bernard Forest de Bélidor • Bernheim Arboretum and Research Forest • Beyond the Forest • Białowieża Forest • Bighorn National Forest • Biltmore Forest, North Carolina • Bitterroot National Forest • Black Forest • Black Forest, Colorado • Boise National Forest • Bracknell Forest • Bridger-Teton National Forest • Carpathian Forest • Charnwood Forest Canal • Chugach National Forest • Cloud forest • Coconino National Forest • Custer National Forest • Daniel Boone National Forest • Del Monte Forest, California • Denbeigh Experimental Forest • Denbigh Experimental Forest • Dhlinza Forest • Dinaric calcareous block fir forest • Drum Manor Forest Park • Dry forest • Dry subtropical forest • Dry tropical forest • Epping Forest National Park • Evergreen forest • Feldberg (Black Forest) • Fern Forest, Hawaii • Foothill Ranch, Lake Forest, California • Forbidden Forest • Forbidden Forest (movie) • Forest Area Township, Lake of the Woods County, Minnesota • Forest City Township, Meeker County, Minnesota • Forest City, Florida • Forest City, Illinois • Forest City, Iowa • Forest City, Missouri • Forest City, North Carolina • Forest County, Pennsylvania • Forest County, Wisconsin • Forest Den National Park • Forest Frederick Edward Yeo-Thomas • Forest Glen, Maryland • Forest Gump • Forest Heights, Maryland • Forest Hill, Gauteng • Forest Hill, Louisiana • Forest Hill, South Africa • Forest Hill, Texas • Forest Hills – 71st Avenue (IND Queens Boulevard Line) • Forest Hills, Kentucky • Forest Hills, Michigan • Forest Hills, North Carolina • Forest Hills, Tennessee • Forest Home Township, Michigan • Forest Home, New York • Forest Lake Township, Washington County, Minnesota • Forest Lake, Illinois • Forest Lake, Minnesota • Forest Lawn Memorial Park (Hollywood Hills) • Forest Lawn Memorial Park, Glendale • Forest Laws • Forest Meadows, California • Forest Oaks, North Carolina • Forest Park Museum and Arboretum • Forest Park, Georgia • Forest Park, Illinois • Forest Park, Ohio • Forest Peoples Programme • Forest Prairie Township, Meeker County, Minnesota • Forest Raven • Forest Research Institute • Forest River, North Dakota • Forest Service • Forest Township, Becker County, Minnesota • Forest Township, Cheboygan County, Michigan • Forest Township, Genesee County, Michigan • Forest Township, Michigan • Forest Township, Minnesota • Forest Township, Missaukee County, Michigan • Forest Township, Rice County, Minnesota • Forest View, Illinois • Forest ecology • Forest gardening • Forest kingfishers • Forest law • Forest laws • Forest of Dean • Forest of Dean Sculpture Trail • Forest of Rossendale • Forest tent caterpillar • Forest ~ Vorst • Forest, Belgium • Forest, Fond du Lac County, Wisconsin • Forest, Louisiana • Forest, Mississippi • Forest, Ohio • Forest, Richland County, Wisconsin • Forest, St. Croix County, Wisconsin • Forest, Vernon County, Wisconsin • Forest, Virginia • Forest, Wisconsin • Frankfurt City Forest • Freedom, Forest County, Wisconsin • Gallatin National Forest • Green Forest, Arkansas • Grey Forest, Texas • Helena National Forest • Hercynian Forest • Hiawatha National Forest • High Forest Township, Olmsted County, Minnesota • Hiles, Forest County, Wisconsin • How We Quit the Forest • Hubbard Brook Experimental Forest • Humboldt-Toiyabe National Forest • Indian Forest Service • International Forest of Friendship • Jean-Claude Forest • Kakamega Forest • Kootenai National Forest • Lagunitas-Forest Knolls, California • Lake Forest Park, Washington • Lake Forest, California • Lake Forest, Illinois • Lake Forest, West Park, Florida • Lake Mack-Forest Hills, Florida • Lee De Forest • Leicester Forest East services • Lewis and Clark National Forest • Lilac Arboretum and Children's Forest • Lincoln, Forest County, Wisconsin • Lolo National Forest • London Borough of Waltham Forest • Los Padres National Forest • M/T and the Narrative About the Marvels of the Forest • Maple Forest Township, Michigan • Mount Baker-Snoqualmie National Forest • Mount Forest Township, Michigan • Mount Hood National Forest • Naaman Forest High School • Neuse Forest, North Carolina • Norris Forest School Arboretum • Norwegian Forest Cat • Nottingham Forest F.C. • Oak Forest, Illinois • Ouachita National Forest • Park Forest, Illinois • Parkhurst Forest • Peak Forest Tramway • Petrified Forest National Park • Pine Forest, Texas • Prescott National Forest • Prince William Forest Park • Quamby Bluff Forest Reserve • River Forest, Illinois • River Forest, Indiana • Rock Forest • Roman Forest, Texas • Roosevelt National Forest • San Bernardino National Forest • Semliki Forest Virus • Sherwood Forest • Sherwood Forest Plantation • Shoshone National Forest • South East Forest National Park • Subtropical dry forest • Swedes Forest Township, Redwood County, Minnesota • Temperate coniferous forest • Teutoburg Forest • Thai Forest Tradition • The Bard's Song (In the Forest) • Thuringian Forest • Tongass National Forest • Tropical and subtropical dry broadleaf forest • Tropical dry forest • Tuart Forest National Park • Uncompahgre National Forest • United States Forest Service • United States National Forest • Wake Forest University • Wake Forest, North Carolina • Wayne National Forest • White River National Forest • Worthington State Forest
arboriculture; tree farming[Classe]
biology; biological science[ClasseHyper.]
traitement des arbres (fr)[Thème]
(lifetime; livelihood; living; life)[termes liés]
arboriculture forestière (fr)[Classe]
(grove; woodland; forest; wood; woods)[termes liés]
traitement des arbres (fr)[termes liés]
ensemble d'arbres (fr)[Classe]
ensemble d'éléments végétaux (fr)[ClasseParExt.]
(sapling; tree)[termes liés]
(florist), (flower; bloom; blossom)[termes liés]
(botany; phytology)[termes liés]
vegetate - vegetal, vegetational, vegetative - sprout, stock - bourgeon, burgeon forth, germinate, pullulate, shoot, sprout, spud - germinate - afforestation, forestation - forest, forestry, silviculture - forest, grove, wood, woodland, woods - forest, timber, timberland, woodland[Dérivé]
flora, plant, plant life, vegetable[Domaine]
grove; woodland; forest; wood; woods[ClasseHyper.]
transport maritime et navigation (fr)[termes liés]
earth - ground - ground - ground - ground - land, set down - bring down, land, put down - down, land, shoot down - land, set ashore, shore - ground, run aground - land - ground, run aground, strand - afforestation, forestation - forest, forestry, silviculture - forest, grove, wood, woodland, woods - forest, timber, timberland, woodland[Dérivé]
Earth, globe, world[Desc]
plant out; plant with; plant; set[ClasseHyper.]
peuplement d'une forêt (fr)[Classe]
arboriculture forestière (fr)[Classe]
grove; woodland; forest; wood; woods[ClasseHyper.]
(grove; woodland; forest; wood; woods)[termes liés]
traitement des arbres (fr)[termes liés]
deposit, lay, place, pose, position, put, set - conversion, transformation - biological science, biology - botany, flora, vegetation - germination, sprouting - biome - dry land, earth, ground, land, solid ground, terra firma[Hyper.]
forest (v. tr.)
||This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (August 2011)|
A forest, also referred to as a wood or the woods, is an area with a high density of trees. As with cities, depending on various cultural definitions, what is considered a forest may vary significantly in size and have different classifications according to how and what of the forest is composed.[vague] These plant communities cover approximately 9.4 percent of the Earth's surface (or 30 percent of total land area), though they once covered much more (about 50 percent of total land area), in many different regions and function as habitats for organisms, hydrologic flow modulators, and soil conservers, constituting one of the most important aspects of the biosphere. Although forests are classified primarily by trees, the concept of a forest ecosystem includes additional species (such as smaller plants, fungi, bacteria, and animals) as well as physical and chemical processes such as energy flow and nutrient cycling.
A typical forest is composed of the overstory (canopy or upper tree layer) and the understory. The understory is further subdivided into the shrub layer, herb layer, and also the moss layer and soil microbes. In some complex forests, there is also a well-defined lower tree layer. Forests are central to all human life because they provide a diverse range of resources: they store carbon, aid in regulating the planetary climate, purify water and mitigate natural hazards such as floods. Forests also contain roughly 90 percent of the world's terrestrial biodiversity.
The word "forest" comes from Middle English forest, from Old French forest (also forès) "forest, vast expanse covered by trees"; first introduced in English as the word for wild land set aside for hunting without the necessity in definition for the existence of trees (James 1981;Muir 2000,2008). Possibly a borrowing (probably via Frankish or Old High German) of the Medieval Latin word foresta "open wood", foresta was first used by Carolingian scribes in the Capitularies of Charlemagne to refer specifically to the king's royal hunting grounds. The term was not endemic to Romance languages (e.g. native words for "forest" in the Romance languages evolved out of the Latin word silva "forest, wood" (English sylvan); cf. Italian, Spanish, Portuguese selva; Romanian silvă; Old French selve); and cognates in Romance languages, such as Italian foresta, Spanish and Portuguese floresta, etc. are all ultimately borrowings of the French word.
The exact origin of Medieval Latin foresta is obscure. Some authorities claim the word derives from the Late Latin phrase forestam silvam, meaning "the outer wood"; others claim the term is a latinisation of the Frankish word *forhist "forest, wooded country", assimilated to forestam silvam (a common practise among Frankish scribes). Frankish *forhist is attested by Old High German forst "forest", Middle Low German vorst "forest", Old English fyrhþ "forest, woodland, game preserve, hunting ground", and Old Norse fýri "coniferous forest", all of which derive from Proto-Germanic *furhísa-, *furhíþja- "a fir-wood, coniferous forest", from Proto-Indo-European *perkwu- "a coniferous or mountain forest, wooded height".
Uses of the word "forest" in English to denote any uninhabited area of non-enclosure are now considered archaic. The word was introduced by the Norman rulers of England as a legal term (appearing in Latin texts like the Magna Carta) denoting an uncultivated area legally set aside for hunting by feudal nobility (see Royal Forest). These hunting forests were not necessarily wooded much, if at all. However, as hunting forests did often include considerable areas of woodland, the word "forest" eventually came to mean wooded land more generally. By the start of the fourteenth century the word appeared in English texts, indicating all three senses: the most common one, the legal term and the archaic usage.
Other terms used to mean "an area with a high density of trees" are wood, woodland, wold, weald, holt, frith and firth. Unlike forest, these are all derived from Old English and were not borrowed from another language. Some classifications now reserve the term woodland for an area with more open space between trees and distinguish among woodlands, open forests, and closed forests based on crown cover.
Forests can be found in all regions capable of sustaining tree growth, at altitudes up to the tree line, except where natural fire frequency or other disturbance is too high, or where the environment has been altered by human activity.
The latitudes 10° north and south of the Equator are mostly covered in tropical rainforest, and the latitudes between 53°N and 67°N have boreal forest. As a general rule, forests dominated by angiosperms (broadleaf forests) are more species-rich than those dominated by gymnosperms (conifer, montane, or needleleaf forests), although exceptions exist.
Forests sometimes contain many tree species only within a small area (as in tropical rain and temperate deciduous forests), or relatively few species over large areas (e.g., taiga and arid montane coniferous forests). Forests are often home to many animal and plant species, and biomass per unit area is high compared to other vegetation communities. Much of this biomass occurs below ground in the root systems and as partially decomposed plant detritus. The woody component of a forest contains lignin, which is relatively slow to decompose compared with other organic materials such as cellulose or carbohydrate.
Forests are differentiated from woodlands by the extent of canopy coverage: in a forest, the branches and the foliage of separate trees often meet or interlock, although there can be gaps of varying sizes within an area referred to as forest. A woodland has a more continuously open canopy, with trees spaced farther apart, which allows more sunlight to penetrate to the ground between them (also see: savanna).
Among the major forested biomes are:
Forests can be classified in different ways and to different degrees of specificity. One such way is in terms of the "biome" in which they exist, combined with leaf longevity of the dominant species (whether they are evergreen or deciduous). Another distinction is whether the forests are composed predominantly of broadleaf trees, coniferous (needle-leaved) trees, or mixed.
A number of global forest classification systems have been proposed, but none has gained universal acceptance. UNEP-WCMC's forest category classification system is a simplification of other more complex systems (e.g. UNESCO's forest and woodland 'subformations'). This system divides the world's forests into 26 major types, which reflect climatic zones as well as the principal types of trees. These 26 major types can be reclassified into 6 broader categories: temperate needleleaf; temperate broadleaf and mixed; tropical moist; tropical dry; sparse trees and parkland; and forest plantations. Each category is described as a separate section below.
Temperate needleleaf forests mostly occupy the higher latitude regions of the northern hemisphere, as well as high altitude zones and some warm temperate areas, especially on nutrient-poor or otherwise unfavourable soils. These forests are composed entirely, or nearly so, of coniferous species (Coniferophyta). In the Northern Hemisphere pines Pinus, spruces Picea, larches Larix, silver firs Abies, Douglas firs Pseudotsuga and hemlocks Tsuga, make up the canopy, but other taxa are also important. In the Southern Hemisphere, most coniferous trees (members of the Araucariaceae and Podocarpaceae) occur in mixtures with broadleaf species that are classed as broadleaf and mixed forests.
Temperate broadleaf and mixed forests include a substantial component of trees in the Anthophyta. They are generally characteristic of the warmer temperate latitudes, but extend to cool temperate ones, particularly in the southern hemisphere. They include such forest types as the mixed deciduous forests of the United States and their counterparts in China and Japan, the broadleaf evergreen rainforests of Japan, Chile and Tasmania, the sclerophyllous forests of Australia, central Chile, the Mediterranean and California, and the southern beech Nothofagus forests of Chile and New Zealand.
There are many different types of tropical moist forests,although most extensive are the lowland evergreen broad leaf rainforests, for example várzea and igapó forests and the terra firma forests of the Amazon Basin; the peat swamp forests, dipterocarp forests of Southeast Asia; and the high forests of the Congo Basin. Forests located on mountains are also included in this category, divided largely into upper and lower montane formations on the basis of the variation of physiognomy corresponding to changes in altitude.
Tropical dry forests are characteristic of areas in the tropics affected by seasonal drought. The seasonality of rainfall is usually reflected in the deciduousness of the forest canopy, with most trees being leafless for several months of the year. However, under some conditions, e.g. less fertile soils or less predictable drought regimes, the proportion of evergreen species increases and the forests are characterised as "sclerophyllous". Thorn forest, a dense forest of low stature with a high frequency of thorny or spiny species, is found where drought is prolonged, and especially where grazing animals are plentiful. On very poor soils, and especially where fire is a recurrent phenomenon, woody savannas develop (see 'sparse trees and parkland').
Sparse trees and parkland are forests with open canopies of 10–30% crown cover. They occur principally in areas of transition from forested to non-forested landscapes. The two major zones in which these ecosystems occur are in the boreal region and in the seasonally dry tropics. At high latitudes, north of the main zone of boreal forest or taiga, growing conditions are not adequate to maintain a continuous closed forest cover, so tree cover is both sparse and discontinuous. This vegetation is variously called open taiga, open lichen woodland, and forest tundra. It is species-poor, has high bryophyte cover, and is frequently affected by fire.
Forest plantations, generally intended for the production of timber and pulpwood increase the total area of forest worldwide. Commonly mono-specific and/or composed of introduced tree species, these ecosystems are not generally important as habitat for native biodiversity. However, they can be managed in ways that enhance their biodiversity protection functions and they are important providers of ecosystem services such as maintaining nutrient capital, protecting watersheds and soil structure as well as storing carbon. They may also play an important role in alleviating pressure on natural forests for timber and fuelwood production.
28 forest categories are used to enable the translation of forest types from national and regional classification systems to a harmonised global one:
Those marked * have been created as a result of data holdings which do not specify the forest type, hence 26 categories are quoted, not 28 shown here.
The scientific study of forest species and their interaction with the environment is referred to as forest ecology, while the management of forests is often referred to as forestry. Forest management has changed considerably over the last few centuries, with rapid changes from the 1980s onwards culminating in a practice now referred to as sustainable forest management. Forest ecologists concentrate on forest patterns and processes, usually with the aim of elucidating cause and effect relationships. Foresters who practice sustainable forest management focus on the integration of ecological, social and economic values, often in consultation with local communities and other stakeholders.
Anthropogenic factors that can affect forests include logging, urban sprawl, human-caused forest fires, acid rain, invasive species, and the slash and burn practices of swidden agriculture or shifting cultivation. The loss and re-growth of forest leads to a distinction between two broad types of forest, primary or old-growth forest and secondary forest. There are also many natural factors that can cause changes in forests over time including forest fires, insects, diseases, weather, competition between species, etc. In 1997, the World Resources Institute recorded that only 20% of the world's original forests remained in large intact tracts of undisturbed forest. More than 75% of these intact forests lie in three countries – the Boreal forests of Russia and Canada and the rainforest of Brazil. In 2006 this information on intact forests was updated using latest available satellite imagery.
Canada has about 4,020,000 square kilometres (1,550,000 sq mi) of forest land. More than 90% of forest land is publicly owned and about 50% of the total forest area is allocated for harvesting. These allocated areas are managed using the principles of sustainable forest management, which includes extensive consultation with local stakeholders. About eight percent of Canada’s forest is legally protected from resource development (Global Forest Watch Canada)(Natural Resources Canada). Much more forest land – about 40 percent of the total forest land base – is subject to varying degrees of protection through processes such as integrated land use planning or defined management areas such as certified forests (Natural Resources Canada).
These maps represent only virgin forest lost. Some regrowth has occurred but not to the age, size or extent of 1620 due to population increases and food cultivation. From William B. Greeley's, The Relation of Geography to Timber Supply, Economic Geography, 1925, vol. 1, p. 1–11. Source of "Today" map: compiled by George Draffan from roadless area map in The Big Outside: A Descriptive Inventory of the Big Wilderness Areas of the United States, by Dave Foreman and Howie Wolke (Harmony Books, 1992).'
By December 2006, over 1,237,000 square kilometers of forest land in Canada (about half the global total) had been certified as being sustainably managed (Canadian Sustainable Forestry Certification Coalition). Clearcutting, first used in the latter half of the 20th century, is less expensive, but devastating to the environment and companies are required by law to ensure that harvested areas are adequately regenerated. Most Canadian provinces have regulations limiting the size of clearcuts, although some older clearcuts can range upwards of 110 square kilometres (27,000 acres) in size which were cut over several years. China instituted a ban on logging, beginning in 1998, due to the destruction caused by clearcutting. Selective cutting avoids the erosion, and flooding, that result from clearcutting.
In the United States, most forests have historically been affected by humans to some degree, though in recent years improved forestry practices has helped regulate or moderate large scale or severe impacts. However, the United States Forest Service estimates a net loss of about 2 million hectares (4,942,000 acres) between 1997 and 2020; this estimate includes conversion of forest land to other uses, including urban and suburban development, as well as afforestation and natural reversion of abandoned crop and pasture land to forest. However, in many areas of the United States, the area of forest is stable or increasing, particularly in many northern states. The opposite problem from flooding has plagued national forests, with loggers complaining that a lack of thinning and proper forest management has resulted in large forest fires.
Old-growth forest contains mainly natural patterns of biodiversity in established seral patterns, and they contain mainly species native to the region and habitat. The natural formations and processes have not been affected by humans with a frequency or intensity to change the natural structure and components of the habitat. Secondary forest contains significant elements of species which were originally from other regions or habitats.
Smaller areas of woodland in cities may be managed as Urban forestry, sometimes within public parks. These are often created for human benefits; Attention Restoration Theory argues that spending time in nature reduces stress and improves health, while forest schools and kindergartens help young people to develop social as well as scientific skills in forests. These typically need to be close to where the children live, for practical logistics.
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