Publicité E▼
slate (n.)
1.(formerly) a writing tablet made of slate
2.a fine-grained metamorphic rock that can be split into thin layers
3.thin layers of rock used for roofing
4.an amount due (as at a restaurant or bar)"add it to my score and I'll settle later"
5.(American;politics)a list of candidates nominated by a political party to run for election to public offices
slate (v. trans.)
1.designate or schedule"He slated his talk for 9 AM" "She was slated to be his successor"
2.cover with slate"slate the roof"
3.cover with slates.
4.enter on a list or slate for an election"He was slated for borough president"
slate (adj.)
1.of the color of slate or granite"the slaty sky of dawn"
slate (v.)
1.design or destine"She was intended to become the director"
Publicité ▼
Merriam Webster
SlateSlate (slāt), n. [OE. slat, sclat, OF. esclat a shiver, splinter, F. éclat, fr. OF. esclater to shiver, to chip, F. éclater, fr. OHG. sleizen to tear, slit, split, fr. slīzan to slit, G. schleissen. See Slit, v. t., and cf. Eclat.]
1. (Min.) An argillaceous rock which readily splits into thin plates; argillite; argillaceous schist.
2. Any rock or stone having a slaty structure.
3. A prepared piece of such stone. Especially: (a) A thin, flat piece, for roofing or covering houses, etc. (b) A tablet for writing upon.
4. An artificial material, resembling slate, and used for the above purposes.
5. A thin plate of any material; a flake. [Obs.]
6. (Politics) A list of candidates, prepared for nomination or for election; a list of candidates, or a programme of action, devised beforehand. [Cant, U.S.] Bartlett.
Adhesive slate (Min.), a kind of slate of a greenish gray color, which absorbs water rapidly, and adheres to the tongue; whence the name. -- Aluminous slate, or Alum slate (Min.), a kind of slate containing sulphate of alumina, -- used in the manufacture of alum. -- Bituminous slate (Min.), a soft species of sectile clay slate, impregnated with bitumen. -- Hornblende slate (Min.), a slaty rock, consisting essentially of hornblende and feldspar, useful for flagging on account of its toughness. -- Slate ax or Slate axe, a mattock with an ax end, used in shaping slates for roofs, and making holes in them for the nails. -- Slate clay (Geol.), an indurated clay, forming one of the alternating beds of the coal measures, consisting of an infusible compound of alumina and silica, and often used for making fire bricks. Tomlinson. -- Slate globe, a globe the surface of which is made of an artificial slatelike material. -- Slate pencil, a pencil of slate, or of soapstone, used for writing on a slate. -- Slate rocks (Min.), rocks which split into thin laminæ, not necessarily parallel to the stratification; foliated rocks. -- Slate spar (Min.), a variety of calcite of silvery white luster and of a slaty structure. -- Transparent slate, a plate of translucent material, as ground glass, upon which a copy of a picture, placed beneath it, can be made by tracing.
SlateSlate, v. t. [imp. & p. p. Slated; p. pr. & vb. n. Slating.]
1. To cover with slate, or with a substance resembling slate; as, to slate a roof; to slate a globe.
2. To register (as on a slate and subject to revision), for an appointment. [Polit. Cant]
SlateSlate, v. t. [Cf. AS. slǣting a privilege of hunting.] To set a dog upon; to bait; to slat. See 2d Slat, 3. [Prov. Eng. & Scot.] [Written also slete.] Ray.
Publicité ▼
⇨ voir la définition de Wikipedia
slate (adj.)
slate-gray, slate-grey, slatey, slaty, slaty-gray, slaty-grey, stone-gray, stone-grey
slate (n.) (American;politics)
nomination, recommendation, ticket, list of candidates (politics)
Voir aussi
slate (n.)
↘ slate-gray, slate-grey, slate pencil, slate quarry, slatey, slaty, slaty-gray, slaty-grey, stone-gray, stone-grey
slate (v. trans.)
⇨ a clean slate • clean slate • have something on one's slate • slate blue • slate club • slate grey • slate pencil • slate quarry • slate roof • slate-black • slate-colored junco • slate-gray • slate-grey • start with a clean slate • wipe the slate clean
⇨ Aberllefenni Slate Quarry • Apple slate • Argillaceous slate • Black Slate • Blank Slate • Blank Slate (The Outer Limits) • Blank slate (disambiguation) • Blue Slate • Blue-slate • Blueish slate • Blueish-slate • Bluish slate • Bluish-slate • Bluish-slate Antshrike • Braichgoch Slate Mine • British narrow gauge slate railways • Burlington Slate Quarries • Chlorite Slate • Clean Slate • Clean Slate (1994 film) • Clean Slate (Kim Possible) • Clean Slate Program • Cody Slate • Collyweston slate • Collyweston stone slate • Cotswold Slate • Criminal Records (Clean Slate) Act 2004 • Dark slate gray • Detroit Cornice and Slate Company Building • Erase the Slate • Fell Exhibition Slate Mine • Full slate • Godfrey Macdonald, 3rd Baron Macdonald of Slate • HP Slate • Honister Slate Mine • Hunsrück Slate • Insh, Slate Islands • Jenny Slate • Jeremy Slate • Little Slate River • Llechwedd Slate Caverns • Lower Slate Lake • Martinsburg Slate • Massachusetts Hornfels-Braintree Slate Quarry • Mr. Slate • National Slate Museum • North River (Slate River) • Red Slate Mountain • Salzburg Slate Alps • Shuna, Slate Islands • Skiddaw Slate • Slate (disambiguation) • Slate (elections) • Slate (magazine) • Slate (programming language) • Slate (turkey) • Slate (writing) • Slate 20 • Slate Covered Bridge • Slate Creek • Slate Creek Bridge • Slate Falls Airport • Slate Falls, Lennox and Addington County, Ontario • Slate Falls, Ontario • Slate Fell • Slate Hill Cemetery • Slate Hill, New York • Slate Industry in Spain • Slate Islands • Slate Islands (Ontario) • Slate Mountain, North Carolina • Slate Range • Slate Range (Alberta) • Slate Range (California) • Slate Ridge • Slate Ridge School • Slate River • Slate River, New Zealand • Slate Run • Slate Springs, Mississippi • Slate and stylus • Slate blue • Slate blues • Slate budgerigar mutation • Slate gray • Slate grays • Slate grey • Slate greys • Slate industry • Slate industry in Wales • Slate masons • Slate operations on the WHR • Slate pencil urchin • Slate pencil urchin (Atlantic) • Slate waggon • Slate wagon • Slate-blue • Slate-blue Seedeater • Slate-blues • Slate-colored • Slate-colored Antbird • Slate-colored Boubou • Slate-colored Fox Sparrow • Slate-coloured Boubou • Slate-coloured Coot • Slate-coloured Grosbeak • Slate-coloured Hawk • Slate-coloured Seedeater • Slate-coloured Solitaire • Slate-gray • Slate-grays • Slate-grey • Slate-greys • Slate-headed Tody-tyrant • Slate-throated Gnatcatcher • Slate-throated Redstart • Slate-throated Whitestart • Smart slate • The Blank Slate • The Slate Group • The Slate Roof House • Welsh slate industry • Woodlawn Farm (Slate Hill, New York)
slate (n.)
tablet[Hyper.]
slate (n.) [American , politics]
recommendation; nomination; slate; list of candidates[ClasseHyper.]
list, listing[Hyper.]
slate[Dérivé]
slate (n.)
slate[Classe]
(blue; bluish; blueish), (blue; blueness)[Caract.]
(gray; grayness; grey; greyness), (gray; grey)[Caract.]
(slab)[Caract.]
sedimentary rock[Hyper.]
slate (n.)
roofing material[Hyper.]
slate[Dérivé]
slate (v.)
plan[Hyper.]
destination, terminus[Dérivé]
slate (v. tr.)
slate (v. tr.)
couvrir d'un toit (fr)[Classe]
(slate)[termes liés]
cover, roof, roof in, roof over[Hyper.]
slating - slate, slating[Dérivé]
slate (v. tr.)
Wikipedia
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. (May 2009) |
Metamorphic rock | |
Slate |
|
Composition | |
---|---|
Primary | quartz, muscovite/illite |
Secondary | biotite, chlorite, hematite, pyrite |
Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism.
The result is a foliated rock in which the foliation may not correspond to the original sedimentary layering. When expertly "cut" by striking with a specialized tool in the quarry, many slates will form smooth flat sheets of stone which have long been used for roofing and floor tiles and other purposes. Slate is frequently grey in color, especially when seen, en masse, covering roofs. However, slate occurs in a variety of colors even from a single locality; for example, slate from North Wales can be found in many shades of grey, from pale to dark, and may also be purple, green or cyan. Slate is not to be confused with shale, from which it may be formed, or schist. Ninety percent of Europe's natural slate used for roofing originates from Spain.[1]
The word "slate" is also used for some objects made from slate. It may mean a single roofing slate, or a writing slate, traditionally a small piece of slate, often framed in wood, used with chalk as a notepad or noticeboard etc., and especially for recording charges in pubs and inns. The phrase "clean slate" or "blank slate" comes from this use.
Contents |
Before the mid-19th century, the terms slate, shale and schist were not sharply distinguished.[2] In the context of underground coal mining, the term slate was commonly used to refer to shale well into the 20th century.[3] For example, roof slate refers to shale above a coal seam, and draw slate refers to roof slate (shale) that falls from the mine roof as the coal is removed.[4]
Slate is mainly composed of quartz and muscovite or illite, often along with biotite, chlorite, hematite, and pyrite and, less frequently, apatite, graphite, kaolin, magnetite, tourmaline, or zircon as well as feldspar. Occasionally, as in the purple slates of North Wales, ferrous reduction spheres form around iron nuclei, leaving a light green spotted texture. These spheres are sometimes deformed by a subsequent applied stress field to ovoids, which appear as ellipses when viewed on a cleavage plane of the specimen.
Slate can be made into roofing slates, which are installed by a slater. Slates are often erroneously called shingles, as shingles made from stone are technically tiles. Slate has two lines of breakability: cleavage and grain, which make it possible to split the stone into thin sheets. When broken, slate retains a natural appearance while remaining relatively flat and easily stackable.
Slate is particularly suitable as a roofing material as it has an extremely low water absorption index of less than 0.4%. Its low tendency to absorb water also makes it very resistant to frost damage and breakage due to freezing.
Slate roof tiles are usually fixed using either nail fixing, or the hook fixing method as is common with Spanish slate. In the UK, nailing is typically done with double nails onto timber battens (England and Wales) or nailed directly onto timber sarking boards (Scotland and Northern Ireland). Nails will traditionally be copper, although modern alloy and stainless steel alternatives are known. Both these methods, if used properly, will provide a long-lasting weathertight roof with a typical lifespan of around 80–100 years.
Some mainland European slate suppliers suggest that using hook fixing means that:[5]
The metal hooks are, however, visible and may be unsuitable for historic properties.
Slate tiles are often used for interior and exterior flooring, stairs, walkways and wall cladding. Tiles are installed and set on mortar and grouted along the edges. Chemical sealants are often used on tiles to improve durability and appearance, increase stain resistance, reduce efflorescence, and increase or reduce surface smoothness. Tiles are often sold gauged, meaning that the back surface is ground for ease of installation. Slate flooring can be slippery when used in external locations subject to rain. Slate tiles were used in 19th century UK building construction (apart from roofs) and in slate quarrying areas such as Blaenau Ffestiniog & Bethesda, Wales there are still many buildings wholly constructed of slate. Slates can also be set into walls to provide a rudimentary damp-proof membrane. Small offcuts are used as shims to level floor joists. In areas where slate is plentiful it is also used in pieces of various sizes for building walls and hedges, sometimes combined with other kinds of stone. In modern homes slate is often used as table coasters.
Because it is a good electrical insulator and fireproof, it was used to construct early-20th century electric switchboards and relay controls for large electric motors. Fine slate can also be used as a whetstone to hone knives.
Due to its thermal stability and chemical inertness, slate has been used for laboratory bench tops and for billiard table tops. In 18th- and 19th-century schools, slate was extensively used for blackboards and individual writing slates for which slate or chalk pencils were used.
In areas where it is available, high-quality slate is used for tombstones and commemorative tablets. In some cases slate was used by the ancient Maya civilization to fashion stelae.
Slate-producing regions in Europe include Wales (see slate industry in Wales), Cornwall (famously the village of Delabole), Cumbria (see Burlington Slate Quarries, Honister Slate Mine and Skiddaw Slate) in the United Kingdom; parts of France (Anjou, Loire Valley, Ardennes, Brittany, Savoie); Belgium (Ardennes); Liguria in northern Italy, especially between the town of Lavagna (which means chalkboard in Italian) and Fontanabuona valley; Portugal especially around Valongo in the north of the country; Spain see Slate Industry in Spain; Germany's (Moselle River-region, Hunsrück, Eifel, Westerwald, Thuringia and north Bavaria); Alta, Norway (actually schist not a true slate) and Galicia. Some of the slate from Wales and Cumbria is colored slate (non-blue): purple and formerly green in Wales and green in Cumbria. China has vast slate deposits; in recent years its export of finished and unfinished slate has increased, it has slate in various colors.
Slate is abundant in Brazil (the second-biggest producer of slate) around Papagaios in Minas Gerais (responsible for 95% of the extraction of slate in Brazil). An independent report by Consultant Geologist J. A. Walsh describes how certain products originating from Brazil on sale in the UK, are not entitled to bear the CE mark.[6]
Other areas known for slate production are the east coast of Newfoundland, the Slate Belt of Eastern Pennsylvania, Buckingham County Virginia (Buckingham Slate), and the Slate Valley of Vermont and New York, where colored slate is mined in the Granville, New York area.
A major slating operation existed in Monson, Maine, during the late 19th and early 20th centuries. The slate found in Monson is usually a dark purple to blackish color, and many local structures are still roofed with slate tiles. The roof of St. Patrick's Cathedral was made of roofing slate from Monson, as is the headstone of John F. Kennedy.[7]
Slate is also found in the Arctic and was used by the Inuit to make the blades for ulus.
Because slate was formed in low heat and pressure, compared to a number of other metamorphic rocks, some fossils can be found in slate; sometimes even microscopic remains of delicate organisms.[8]
Wikimedia Commons has media related to: Slate |
|
Contenu de sensagent
dictionnaire et traducteur pour sites web
Alexandria
Une fenêtre (pop-into) d'information (contenu principal de Sensagent) est invoquée un double-clic sur n'importe quel mot de votre page web. LA fenêtre fournit des explications et des traductions contextuelles, c'est-à-dire sans obliger votre visiteur à quitter votre page web !
Essayer ici, télécharger le code;
SensagentBox
Avec la boîte de recherches Sensagent, les visiteurs de votre site peuvent également accéder à une information de référence pertinente parmi plus de 5 millions de pages web indexées sur Sensagent.com. Vous pouvez Choisir la taille qui convient le mieux à votre site et adapter la charte graphique.
Solution commerce électronique
Augmenter le contenu de votre site
Ajouter de nouveaux contenus Add à votre site depuis Sensagent par XML.
Parcourir les produits et les annonces
Obtenir des informations en XML pour filtrer le meilleur contenu.
Indexer des images et définir des méta-données
Fixer la signification de chaque méta-donnée (multilingue).
Renseignements suite à un email de description de votre projet.
Jeux de lettres
Les jeux de lettre français sont :
○ Anagrammes
○ jokers, mots-croisés
○ Lettris
○ Boggle.
Lettris
Lettris est un jeu de lettres gravitationnelles proche de Tetris. Chaque lettre qui apparaît descend ; il faut placer les lettres de telle manière que des mots se forment (gauche, droit, haut et bas) et que de la place soit libérée.
boggle
Il s'agit en 3 minutes de trouver le plus grand nombre de mots possibles de trois lettres et plus dans une grille de 16 lettres. Il est aussi possible de jouer avec la grille de 25 cases. Les lettres doivent être adjacentes et les mots les plus longs sont les meilleurs. Participer au concours et enregistrer votre nom dans la liste de meilleurs joueurs ! Jouer
Dictionnaire de la langue française
Principales Références
La plupart des définitions du français sont proposées par SenseGates et comportent un approfondissement avec Littré et plusieurs auteurs techniques spécialisés.
Le dictionnaire des synonymes est surtout dérivé du dictionnaire intégral (TID).
L'encyclopédie française bénéficie de la licence Wikipedia (GNU).
Copyright
Les jeux de lettres anagramme, mot-croisé, joker, Lettris et Boggle sont proposés par Memodata.
Le service web Alexandria est motorisé par Memodata pour faciliter les recherches sur Ebay.
La SensagentBox est offerte par sensAgent.
Traduction
Changer la langue cible pour obtenir des traductions.
Astuce: parcourir les champs sémantiques du dictionnaire analogique en plusieurs langues pour mieux apprendre avec sensagent.
calculé en 0,047s