Injection or injected may refer to:

Science and technology

Injective function In mathematics, an injective function (also known as injection, or one-to-one function) is a function that maps distinct elements of its domain to distinct elements; that is, implies . (Equivalently, implies in the equivalent contrapositiv ...

, a mathematical function mapping distinct arguments to distinct values *

Injection (medicine) An injection (often and usually referred to as a "shot" in US English, a "jab" in UK English, or a "jag" in Scottish English and Scots) is the act of administering a liquid, especially a drug, into a person's body using a needle (usually a hyp ...

, insertion of liquid into the body with a syringe * Injection, in broadcasting, the level at which a

subcarrier A subcarrier is a sideband of a radio frequency carrier wave, which is modulated to send additional information. Examples include the provision of colour in a black and white television system or the provision of stereo in a monophonic radio broa ...

is sent by the transmitter, expressed as a percent of total modulation * Injection

quill A quill is a writing tool made from a moulted flight feather (preferably a primary wing-feather) of a large bird. Quills were used for writing with ink before the invention of the dip pen, the metal- nibbed pen, the fountain pen, and, eventually ...

, used in the petrochemical industry to insert chemicals, typically inhibitors, for proper mixture within a base chemical *

Fuel injection Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All comp ...

, a means of metering fuel into an internal combustion engine * Orbit injection, changing a stable orbit into a transfer orbit * Injection, in construction, insertion of consolidation materials (i.e., cement grout mixtures,

gravel Gravel is a loose aggregation of rock fragments. Gravel occurs naturally throughout the world as a result of sedimentary and erosive geologic processes; it is also produced in large quantities commercially as crushed stone. Gravel is classifi ...

) by means of dry type rotary shortcrete high pressure pumps *

Injection well An injection well is a device that places fluid deep underground into porous rock formations, such as sandstone or limestone, or into or below the shallow soil layer. The fluid may be water, wastewater, brine (salt water), or water mixed with indus ...

Injection moulding Injection moulding (U.S. spelling: injection molding) is a manufacturing process for producing parts by injecting molten material into a mould, or mold. Injection moulding can be performed with a host of materials mainly including metals (for ...

, a technique for making parts from plastic material

Computing

Code injection Code injection is the exploitation of a computer bug that is caused by processing invalid data. The injection is used by an attacker to introduce (or "inject") code into a vulnerable computer program and change the course of execution. The re ...

, a security violation technique using unexpected program modification * Dependency injection, a programming design pattern, also referred to as inversion of control *

Email injection Email injection is a security vulnerability that can occur in Internet applications that are used to send email messages. It is the email equivalent of HTTP Header Injection. Like SQL injection attacks, this vulnerability is one of a general class ...

, a security violation technique using web email forms *

Fault injection In computer science, fault injection is a testing technique for understanding how computing systems behave when stressed in unusual ways. This can be achieved using physical- or software-based means, or using a hybrid approach. Widely studied phys ...

, a software testing technique *

Network injection Wireless security is the prevention of unauthorized access or damage to computers or data using wireless networks, which include Wi-Fi networks. The term may also refer to the protection of the wireless network itself from adversaries seeking to ...

, an attack on access points that are exposed to non-filtered network traffic *

SQL injection In computing, SQL injection is a code injection technique used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker). SQL inj ...

, a security violation technique using database commands

Arts, entertainment and media

* ''Injected'' (album), a 1995 album by Phunk Junkeez *

Injected (band) Injected was an American rock band, inspired by acts such as Helmet, Refused and Quicksand. History After forming in the mid-1990s by a group of high school friends and spending years gathering a strong following on the Atlanta rock scene, I ...

, a rock band from Atlanta, Georgia * ''Injection'' (comics), an Image Comics science fiction series by Warren Ellis and Declan Shalvey * "Injection", song by Rise Against from ''

The Sufferer & the Witness ''The Sufferer & the Witness'' is the fourth studio album by American punk rock band Rise Against, released on July 4, 2006. A melodic hardcore album, it comprises thirteen tracks that focus on melody, catchy hooks, and rapid-paced tempo. Socia ...

'', 2006

Other uses

Injection (economics) Injections in economics are introductions of income into circular flow from sources outside households and businesses, such as additions to investment, government expenditure and exports."The Nature of the Economy," ''Reserve Bank of Australia,'' ...

, a financial boost to an economy *

Drug injection Drug injection is a method of introducing a drug into the bloodstream via a hollow hypodermic needle, which is pierced through the skin into the body (usually intravenously, but also at an intramuscular or subcutaneous location). Intravenous t ...

of recreational drugs

Science and technology

Computing

Arts, entertainment and media

Other uses

See also