extension

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extension

1. Commerce a delay, esp one agreed by all parties, in the date originally set for payment of a debt or completion of a contract
2. the property of matter by which it occupies space; size
3. Med a steady pull applied to a fractured or dislocated arm or leg to restore it to its normal position
4. 
a. a service by which some of the facilities of an educational establishment, library, etc., are offered to outsiders
b. (as modifier): a university extension course
5. Logic
a. the class of entities to which a given word correctly applies: thus, the extension of satellite of Mars is the set containing only Deimos and Phobos
b. conservative extension a formal theory that includes among its theorems all the theorems of a given theory

Extension

 

in metalworking. (1) Hot deformation, in which the length of a billet is increased by decreasing the area of its cross section. Extension is performed on hammers and presses by successive pressings of the billet, with a rotation of 90° after each pressing.

(2) Cold sheet pressing, in which hollow components are made from sheets. Cold extension is used to make bushings, casings for instruments and apparatus, and cans and saucepans. The billet is usually cut from a sheet, with an allowance for diameter, and is pressed into the peripheral area of the matrix. Upon the subsequent movement of the puncheon, the middle, unpressed part of the billet is pressed into the opening in the matrix.

extension

[ik′sten·chən]
(mathematics)
extension fields
(physiology)
A movement which has the effect of straightening a limb.

extension

A wing or structure added to an existing building.

extension

(filename extension)

extension

(programming)
A feature or piece of code which extends a program's functionality, e.g. a plug-in.

extension

(1) See domain extension.

(2) A software add-on. For example, extensions add functionality to Firefox and Chrome Web browsers.

(3) Prior to Mac OS X, an executable module that enhanced the Mac operating system. The Windows counterpart is a "dynamic link library" (see DLL).

(4) Enhancements to Apple's iOS 8 and OS X Version 10.10 that enable apps to share functions in other apps. See "iOS 8" in iOS versions.

(5) A file type that is appended to the end of a file name. All executable programs in the Windows and Mac worlds use extensions: .EXE in Windows; .APP in Mac (see APP file). In the Unix/Linux environment, "executables" do not use an extension, but no matter which environment, "data" files have extensions. For example, a file with a .DOC or .DOCX extension is a Microsoft Word document. A file with a .JPG extension is a JPEG image.

Prior to Windows 95, extensions were limited to three characters. Starting with Windows 95, they can be very large (254-260 characters depending on Windows version); however, they are kept small in practice.

Common Extensions and Exhaustive Lists
In this encyclopedia, more than 500 common file extensions are listed under the terms "extension," followed by their first letter such as extension a, extension b and extension c. However, there are websites that catalog many more, including the most obscure; for example, visit www.filext.com. See Win Show file extensions, dangerous extensions and graphics formats. See also domain extension.
References in periodicals archive ?
I stress again that these conditions only occur if the nail extensions are not looked after properly.
They then discuss the type of nail extensions that would be best for the customer, various options for decorating the nails, and when to return to the salon for maintenance or new extensions.
Pammy Kaul, leading nail art technician said that normal nail paint is boring and in order to be different, one should try various nail art techniques like nail extensions.
Within beauty therapy students will cover body massage, aromatherapy, Indian head massage and nail extensions.
Other services include more traditional beauty treatments such as spraytans and nail extensions.
EVERY parent in the land will have been appalled to read about Beki Wilkinson, who allows her three-year-old daughter Tia to have spray-tans and nail extensions.
FIFA are deciding now whether to lower the crossbar or allow them to wear their nail extensions.
Swarovski over French manicure, gelled nail extensions that don't chip or fall off.
Julie Howatson-Broster was hooked on fortnightly spray tans, nail extensions, lipgloss and perfect make-up, Springwatch's Kate Humble she ain't.
You need someone who specialises in nail extensions.
The college offers a comprehensive selection of NVQ level 1, 2 and 3 courses for students wishing to enter the beauty industry, including beauty therapy, spa therapy, reflexology, body massage, Indian head massage, hair-dressing and nail extensions.