AskDefine | Define birch

Dictionary Definition

birch adj : consisting of or made of wood of the birch tree [syn: birchen, birken]

Noun

1 hard close-grained wood of any of various birch trees; used especially in furniture and interior finishes and plywood
2 any betulaceous tree or shrub of the genus Betula having a thin peeling bark [syn: birch tree]
3 bundle of birch twigs used to hit people as punishment [syn: birch rod] v : whip with a birch twig

User Contributed Dictionary

English

Pronunciation

  • bû(r)ch, /bɜː(r)tʃ/, /b3:(r)tS/

Etymology

Old English birce, bierce, beorc

Noun

  1. any of various trees of the genus Betula, native to countries in the northern hemisphere.
  2. a hard wood taken from the birch tree, typically used to make furniture.
  3. a stick, rod or bundle of twigs made from birch wood, used for punishment.

Translations

birch tree birch wood punishment device

Verb

  1. to punish with a stick, bundle of twigs, or rod made of birch wood.
  2. to punish as though one were using a stick, bundle of twigs, or rod made of birch wood.

Translations

punish with a birch punish as if one were using a birch

Derived terms

Extensive Definition

Birch is the name of any tree of the genus Betula (Bé-tu-la), in the family Betulaceae, closely related to the beech/oak family, Fagaceae. These are generally small to medium-size trees or shrubs, mostly of northern temperate climates. The simple leaves may be toothed or lobed. The fruit is a small samara, although the wings may be obscure in some species. They differ from the alders (Alnus, the other genus in the family) in that the female catkins are not woody and disintegrate at maturity, falling apart to release the seeds, unlike the woody cone-like female alder catkins.
The common name birch is derived from an old Germanic root, birka, with the Proto-Indo-European root *bherəg, "white, bright; to shine." The Proto-Germanic rune berkanan is named after the birch. The botanic name Betula is from the original Latin. Birch is used as a food plant by the larvae of a large number of Lepidoptera (butterflies and moths) species, see List of Lepidoptera that feed on birches.
The birch is considered a national tree of Russia, where it used to be worshipped as a goddess during the Green Week in early June.
The bark of all birches is characteristically marked with long horizontal lenticels, and often separates into thin papery plates, especially upon the Paper Birch. It is practically imperishable, due to the resinous oil which it contains. Its decided color gives the common names Red, White, Black, Silver and Yellow to different species.
The buds form early and are full grown by midsummer, all are lateral, no terminal bud is formed; the branch is prolonged by the upper lateral bud. The wood of all the species is close-grained with satiny texture and capable of taking a fine polish; its fuel value is fair.
The leaves of the different species vary but little. All are alternate, doubly serrate, feather-veined, petiolate, and stipulate. Apparently they often appear in pairs, but these pairs are really borne on spur-like two-leaved lateral branchlets.

Flower and fruit

The flowers are monoecious, opening with or before the leaves and borne on three-flowered clusters in the axils of the scales of drooping or erect aments. Staminate aments are pendulous, clustered or solitary in the axils of the last leaves of the branch of the year or near the ends of the short lateral branchlets of the year. They form in early autumn and remain rigid during the winter. The scales of the staminate aments when mature are broadly ovate, rounded, yellow or orange color below the middle, dark chestnut brown at apex. Each scale bears two bractlets and three sterile flowers, each flower consisting of a sessile, membranaceous, usually two-lobed, calyx. Each calyx bears four short filaments with one-celled anthers or strictly, two filaments divided into two branches, each bearing a half-anther. Anther cells open longitudinally. The pistillate aments (catkins) are erect or pendulous, solitary; terminal on the two-leaved lateral spur-like branchlets of the year. The pistillate scales are oblong-ovate, three-lobed, pale yellow green often tinged with red, becoming brown at maturity. These scales bear two or three fertile flowers, each flower consisting of a naked ovary. The ovary is compressed, two-celled, crowned with two slender styles; the ovule is solitary.
The ripened pistillate ament is called a strobile and bears tiny winged nuts, packed in the protecting curve of each brown and woody scale. These nuts are pale chestnut brown, compressed, crowned by the persistent stigmas. The seed fills the cavity of the nut. The cotyledons are flat and fleshy. All the species are easily grown from seed., is thermoplastic and waterproof; it was used as a glue on, for example, arrows, and also for medicinal purposes.
Silver Birch (Betula pendula) is Finland's national tree. Occasionally one uses leafy, fragrant twigs of silver birch to gently beat oneself in a sauna. The twigs are called vihta or vasta. This has a relaxing effect on the muscles.
Birch leaves make a diuretic tea and to make extracts for dyes and cosmetics.
Ground birch bark, fermented in sea water, is used for seasoning the woolen, hemp or linen sails and hemp rope of traditional Norwegian boats.
Birch twigs were bound in a bundle, also called birch, to be used for birching, a form of corporal punishment.
Many of the First Nations of North America prized the birch for its bark, which due to its light weight, flexibility, and the ease with which it could be stripped from fallen trees, was often used for the construction of strong, waterproof but lightweight canoes, bowls, and tipis.
Birch is used as firewood due to its high calorific value per unit weight and unit volume. Birch is prized by the Sami people as it burns well, without popping, even when frozen and freshly hewn. The bark is also used in starting fires. The bark will burn very well, even when wet, because of the oils it contains. With care, the bark can be split into very thin sheets that will ignite from even the smallest of sparks.
Birches also have spiritual importance in several religions, both modern and historical.
Birch ply is made from laminations of birch veneer. It is light but strong and has many other good properties. Birch ply is used to make longboards (skateboard), giving it a strong yet flexy ride. It is also used (often in very thin grades with many laminations) for making model aircraft.

Tonewood

Baltic Birch is among the most sought after wood in the manufacture of speaker cabinets. Birch has a natural resonance that peaks in the high and low frequencies, which are also the hardest for speakers to reproduce. This resonance compensates for the roll-off of low and high frequencies in the speakers, and evens the tone. Birch is known for having "natural EQ."
Drums are often made from Birch. Prior to the 1970s, Birch was one of the most popular drum woods. Because of the need for greater volume and midrange clarity, drums were made almost entirely from maple until recently, when advancements in live sound reinforcement and drum mics have allowed the use of Birch in high volume situations. Birch drums have a natural boost in the high and low frequencies, which allow the drums to sound fuller.
Birch wood is sometimes used as a tonewood for semi-acoustic and acoustic guitar bodies and occasionally used for solid-body guitar bodies. Birch wood is also a common material used in mallets for keyboard percussion.

Food

In Belarus, Russia, the Baltic States, Finland, and parts of northern China, birch sap is consumed as a refreshing beverage, and is believed to have tonic qualities. It is watery and pale green in color, with a slightly sweet flavor, and is bottled commercially. Birch sap may also made into kvass. The sap of particular birch species may also be rendered into birch syrup, vinegar, birch beer (a drink similar to root beer), and other foods. In contrast to maple syrup, birch syrup is very difficult to produce, making it more expensive than other food syrups. It is also considerably less sweet than maple syrup and the sap for syrup production is not available until a month later than maple's. The syrup is made mainly in Alaska (from Alaska Birch) and Russia (from several species), and more rarely elsewhere.
Xylitol can also be extracted from birch, a sugar alcohol artificial sweetener, which has shown effectiveness in preventing, and in some cases repairing, tooth decay.
According to the Food Network series Unwrapped, birch is a preferred wood for the manufacture of toothpicks.

Medicinal

In northern latitudes birch is considered to be the most important allergenic tree pollen, with an estimated 15-20% of hay fever sufferers sensitive to birch pollen grains.
The chaga mushroom is an adaptogen that grows on white birch trees, extracting the birch constituents and is used as a remedy for cancer.
The bark is high in betulin and betulinic acid, phytochemicals which have potential as pharmaceuticals, and other chemicals which show promise as industrial lubricants.
Birch bark can be soaked until moist in hot water, and then formed into a cast for a broken arm .
The inner bark of birch can be ingested safely.
birch in Afrikaans: Berk
birch in Arabic: بتيولا
birch in Belarusian (Tarashkevitsa): Бяроза (дрэва)
birch in Bulgarian: Бреза
birch in Catalan: Bedoll
birch in Czech: Bříza
birch in Welsh: Bedwen
birch in Danish: Birk
birch in Pennsylvania German: Baerickebaam
birch in German: Birken
birch in Estonian: Kask
birch in Modern Greek (1453-): Σημύδα
birch in Spanish: Betula
birch in Esperanto: Betulo
birch in Basque: Urki
birch in French: Bouleau
birch in Scottish Gaelic: Beith
birch in Hungarian: Nyírfa
birch in Kazakh: Қайың
birch in Korean: 자작나무속
birch in Upper Sorbian: Brěza
birch in Ido: Birko
birch in Icelandic: Birki
birch in Italian: Betula
birch in Hebrew: שדר
birch in Georgian: არყი
birch in Latin: Betula
birch in Lithuanian: Beržas
birch in Dutch: Berk
birch in Dutch Low Saxon: Birk
birch in Japanese: カバノキ属
birch in Norwegian: Bjørker
birch in Norwegian Nynorsk: Bjørk
birch in Occitan (post 1500): Beç
birch in Polish: Brzoza
birch in Portuguese: Bétula
birch in Romanian: Mesteacăn
birch in Quechua: Awidul
birch in Russian: Берёза
birch in Albanian: Betula
birch in Slovenian: Breza
birch in Serbian: Бреза
birch in Serbo-Croatian: Breza (biljka)
birch in Finnish: Koivut
birch in Swedish: Björksläktet
birch in Turkish: Huş
birch in Ukrainian: Береза
birch in Walloon: Beyôle
birch in Chinese: 桦树
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