Highly decorative Window in a Japanese Onsen in Hakone

A window is an opening in an otherwise solid, opaque surface through which light can pass. For example, a window in the wall of a house, or a window in a scientific measurement device that permits reading of certain wavelengths. Official language Japanese Capital Tokyo Largest City Tokyo Emperor Akihito Prime Minister Junichiro Koizumi Area  - Total  - % water Ranked 60th 377,835 km² 0. ... Outdoor pool, Naruko Outdoor Onsen on Nakanoshima island in Nachikatsuura, Wakayama Prefecture Old onsen in Hakone Guidebook to Hakone from 1811 An onsen (温泉; often indicated on signs and maps by 湯 or ゆ, for hot water) is a Japanese hot spring. ... Hakone (箱根町; -machi) is a town located in Ashigarashimo District, Kanagawa, Japan. ...

Window is also used metaphorically to refer to a time period during which something can occur and outside of which the thing cannot occur, as in a window of opportunity to launch a rocket to the moon on the most efficient trajectory. A Redstone rocket, part of the Mercury program A rocket is a vehicle, missile or aircraft which obtains thrust by the reaction to the ejection of fast moving exhaust gas from within a rocket engine. ... Crust composition Oxygen 43% Silicon 21% Aluminium 10% Calcium 9% Iron 9% Magnesium 5% Titanium 2% Nickel 0. ...

The word Window dates back to Old Norse "Wind Eye"; opening to the air. Old Norse is the Germanic language once spoken by the inhabitants of Scandinavia and their overseas settlements during the Viking Age, until the 13th century. ...

Double-hung vinyl replacement window with a decorative grille sandwiched between the panes of the insulated glass.

Woven bamboo window of the Joan tea house in the Urakuen tea garden in Inuyama

A window can be a simple hole in a stone wall

Opening in wall

A window is an opening in the wall of a building that allows light to enter a room and people to see out. At previous times in history they were merely small oval or square holes in the walls. This article is about structural, boundary and retaining walls. ... Building is either the act of creating an object assembled from more than one element, or the object itself; see also construction. ...

Very early windows were shielded with hide or cloth stretched over the opening or wooden shutters. Later, three types of windows were invented that allowed light but not weather to pass into a building: mullioned glass windows, which joined multiple small pieces of glass with leading, paper windows, and windows made of plates of thinly sliced marble. Mullioned glass windows were the windows of choice among European well-to-do, whereas paper windows were economical and widely used in ancient China and Japan. In England, glass became common in the windows of ordinary homes only in the early 17th century. Modern-style floor-to-ceiling windows became possible only after the industrial glass-making process was perfected. A shutter is a movable cover or screen that alternately prevents and permits the passage of some desirable (or undesirable) element. ... For the lead in news writing, see news style. ... Piece of paper Paper is a thin, flat material produced by the compression of fibres. ... Marble This page is about the metamorphic rock. ... World map showing location of Europe A satellite composite image of Europe Europe is geologically and geographically a peninsula, forming the westernmost part of Eurasia. ... The Great Wall of China, stretching over 6,700 km, was erected beginning in the 3rd century BC to guard the north from raids by men on horses. ... Official language Japanese Capital Tokyo Largest City Tokyo Emperor Akihito Prime Minister Junichiro Koizumi Area  - Total  - % water Ranked 60th 377,835 km² 0. ... Royal motto: Dieu et mon droit (French: God and my right) Englands location within the UK Official language English de facto Capital London de facto Largest city London Area  - Total Ranked 1st UK 130,395 km² Population  - Total (2001)  - Density Ranked 1st UK 49,138,831 377/km² Religion... (16th century - 17th century - 18th century - more centuries) As a means of recording the passage of time, the 17th century was that century which lasted from 1601-1700. ...

Modern windows are customarily large glassed-in rectangles or squares. Churches traditionally have stained glass windows. The physics definition of a glass is a uniform amorphous solid material, usually produced when a suitably viscous molten material cools very rapidly, thereby not giving enough time for a regular crystal lattice to form. ... A church building is a building used in Christian worship. ... Strictly speaking, stained glass is glass that has been painted with silver stain and then fired. ...

Today a window can be made in any shape and size desired.

Windows styles

Modern windows come in many styles. These include:

• Double-hung sash window: The traditional style of window, with two parts (sashes) that overlap slightly and slide up and down inside the frame.
• Single-hung sash window: one sash is moveable and the other fixed.
• Sliding window: has two or more sashes that overlap slightly but slide horizontally within the frame.
• Casement window: A window that turns out at an angle, staying fixed along one side, usually opened using a crank.
• Vent Window: Like a casement window but with the hinge at the top or bottom.
• Tilt and slide: a window combining the opening options of a casement and a sliding window.
• Tilt and turn: a window combining the opening options of a casement and vent window.
• Jalousie window: A window comprising many slats of glass that open and close like a Venetian blind, usually using a crank. A Jalousie door is a door with a Jalousie window.
• Clerestory window: A vertical window set in a roof structure or high in a wall, used for daylighting.
• Skylight: A flat or sloped window built into a roof structure for daylighting
• Bay window: A multipanel window, with at least three panels set at different angles to create a protrusion from the wall line.
• Oriel window
• Fixed window: A window that cannot be opened. A non-openind window is sometimes called a "light" because its function is limited to allowing light to enter without any outside air. (Clerestory windows are often fixed.)
• Picture window: A very large fixed window in a wall, intended to provide an unimpeded view as if framing a picture.

A replacement window is a framed window designed to slip inside the original window frame from the inside after the old sashes are removed. A person who holds strong, unorthodox opinions is sometimes called a crank. ... A hinge is a mechanical device that connects two solid objects, allowing a relative motion between them. ... WindowBlinds is also the name of desktop theming software produced by a company called Stardock. ... Clerestory or (clear storey), in architecture, denotes an upper storey of a Roman basilica or of the nave of a Romanesque or Gothic church, the walls of which rise above the rooflines of the lower aisles and are pierced with windows. ... A roof is the top covering of a building that prevents the ingress of weather into the building interior. ... This article is about use of natural sunlight for interior illumination. ... This article is about use of natural sunlight for interior illumination. ... Oriel windows are a form of window commonly found in Gothic revival architecture, which jut out from the main wall of the building but do not reach to the ground. ...

A new construction window is a window with a nailing fin designed to be inserted into a rough opening from the outside before applying siding and inside trim.

Window materials

Modern windows have insulated glazing, called insulated glass when made from glass, which is usually double paned but might be triple paned. Insulated glazing is a piece of glazing consisting of two or more layers of glazing separated by a spacer along the edge and sealed to create a dead air space between the layers. ... Insulated glazing is a piece of glazing consisting of two or more layers of glazing separated by a spacer along the edge and sealed to create a dead air space between the layers. ... Insulated glazing is a piece of glazing consisting of two or more layers of glazing separated by a spacer along the edge and sealed to create a dead air space between the layers. ... Insulated glazing is a piece of glazing consisting of two or more layers of glazing separated by a spacer along the edge and sealed to create a dead air space between the layers. ...

Modern windows are made from large sheets of glass while windows in the past were made from multiple panes held together by a grille within the sash, also called muntin bars or mullions. Today, decorative muntin bars are attached on the surface of the glazing or sandwiched between the panes of the insulated glazing. Most companies use the term grille for the set of decorative muntin bars within a sash. Insulated glazing is a piece of glazing consisting of two or more layers of glazing separated by a spacer along the edge and sealed to create a dead air space between the layers. ...

Frames and sashes were traditionally made of wood, but metal, vinyl, and composites are also common. Solid metal frames and sashes are inefficient because metal conducts heat and cold. Some frames are made of vinyl-clad or aluminum-clad wood. Modern metal window parts consist of two halves separated by insulating spacer. A vinyl is an organic molecule containing a vinyl group: H R / C = C / H H where R represents a functional group such as a hydrocarbon or halogen. ... Composite materials (or composites for short) are engineering materials made from two or more components. ...

The terms "single-light" or "double-light" (or "'more'-light") refer to the number of glass panes in a window. The physics definition of a glass is a uniform amorphous solid material, usually produced when a suitably viscous molten material cools very rapidly, thereby not giving enough time for a regular crystal lattice to form. ...

The beam or arch over the top of a window is known as the lintel or transom. A lintel or header is a horizontal beam used in the construction of buildings. ... Transom (probably a corruption of Latin transtrum, a thwart, in a boat; equivalents are French traverse, croisillon, German Losholz) is the architectural term given to the horizontal lintel or beam which is framed across a window, dividing it into stages or heights. ...

Many windows have movable window coverings to keep out light, provide additional insulation, or ensure privacy. A window covering is material used to cover a window to reduce sunlight, to provide additional weatherproofing, or to ensure privacy. ...

See also

• Fenestration links [[1]  (http://www.foreignword.com/glossary/fenestration/default.htm#a)]
• The window cleaner Windex
• Double Glazing (http://www.alldoubleglazing.co.uk/)
• Window tax
• Defenestration