Injection
Injection or injected may refer to:
Science and technology
- Injection (medicine), insertion of liquid into the body with a syringe
 - Injective function, a mathematical function mapping distinct arguments to distinct values
 - Injection, in broadcasting, the level at which a subcarrier is sent by the transmitter, expressed as a percent of total modulation
 - Injection quill, used in the petrochemical industry to insert chemicals, typically inhibitors, for proper mixture within a base chemical
 - Fuel injection, 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) by means of dry type rotary shortcrete high pressure pumps
 - Injection well
 - Injection moulding, a technique for making parts from plastic material
 
Computing
- Code injection, a security violation technique using unexpected program modification
 - Dependency injection, a programming design pattern, also referred to as inversion of control
 - Email injection, a security violation technique using web email forms
 - Fault injection, a software testing technique
 - Network injection, an attack on access points that are exposed to non-filtered network traffic
 - SQL injection, a security violation technique using database commands
 
Arts, entertainment and media
- Injected (album), a 1995 album by Phunk Junkeez
 - Injected (band), 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, 2006
 
Other uses
- Injection (economics), a financial boost to an economy
 - Drug injection of recreational drugs