# injection
## English
### Etymology

Borrowed from Middle French injection, from Latin iniectio. The mathematical sense is from French injection, introduced by Nicolas Bourbaki in their treatise Éléments de mathématique.

### Pronunciation

* IPA: /ɪnˈd͡ʒɛk.ʃən/
* Audio (Southern England):(file)
* Hyphenation: in‧jec‧tion
* Rhymes: -ɛkʃən

### Noun

injection (countable and uncountable, plural injections)
* The act of injecting, or something that is injected.
** 2010, Paul Shreve, David W. Townsend, Clinical PET-CT in Radiology: Integrated Imaging in Oncology, →ISBN, page 78:For some indications in PET imaging, it is necessary for radiopharmaceutical injections to be administered contralaterally or pedally to the disease process
* A specimen prepared by injection.
* (category theory) A morphism from either one of the two components of a coproduct to that coproduct.
* (construction) The act of inserting materials like concrete grout or gravel by using high pressure pumps.
* (figuratively) The supply of additional funding to a person or a business.
    The troubled business received a much-needed cash injection.
* (mathematics) A relation on sets (X,Y) that associates each element of Y with at most one element of X.
    Synonym: injective function
* (computer security) The insertion of program code into an application, URL, hardware, etc.; especially when malicious or when the target is not designed for such insertion.
    a SQL injection exploit allowing a malicious user to modify a database query
* (space science) The act of putting a spacecraft into a particular orbit, especially for changing a stable orbit into a transfer orbit, e.g. trans-lunar injection.
** 2015, Henry L. Richter, America's Leap Into Space:It had been determined that one of the whip turnstile antennas had broken off from Explorer 1 shortly after injection into orbit, so these were eliminated.
* (set theory) A function that maps distinct x in the domain to distinct y in the codomain; formally, a f: X → Y such that f(a) = f(b) implies a = b for any a, b in the domain.
* (medicine) Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle.
* (medicine) Congestion (of a body part, with blood or other fluid), such as hyperemia.
    conjunctival injection
* (internal combustion engines) Fuel injection: the pressurized introduction of fuel into a cylinder.
    direct injection
    tuned port injection
* (steam engines) The act of throwing cold water into a condenser to produce a vacuum.
* (steam engines) The cold water thrown into a condenser to produce a vacuum.

#### Hyponyms

* direct injection
* picoinjection
* sperm injection
* water injection
* broker injection
* code injection
* constructor injection
* dependency injection
* email injection
* fault injection
* network injection
* packet injection
* prompt injection
* SQL injection
* URL injection
* gravel injection
* grout injection

#### Derived terms

* agroinjection
* autoinjection
* beef injection
* booster injection
* coinjection
* crossinjection
* electroinjection
* femtoinjection
* Heathrow injection
* hot-beef injection
* hot beef injection
* injectional
* injection lipolysis
* injection molding
* injection moulding
* injective
* injectively
* interinjection
* lethal injection
* lipoinjection
* meat injection
* microinjection
* nanoinjection
* postinjection
* preinjection
* reinjection
* superinjection
* supervised injection site
* trans-Earth injection
* transjection
* trans-lunar injection
* trans-Mars injection
* water for injection
* injection cock
* injection condenser
* injection pipe

#### Related terms

* inject

#### Translations
### See also

* bijection (2)
* hypodermic
* immunization
* jab
* surjection (2)

### References

* injection on Wikipedia.Wikipedia

## French
### Etymology

Learned borrowing from Latin iniectiō.

### Pronunciation

* IPA: /ɛ̃.ʒɛk.sjɔ̃/
* Audio:(file)

### Noun

injection f (plural injections)
* injection
* (mathematics, logic, set theory) injection
    Coordinate terms: surjection, bijection

#### Derived terms

* injectif

#### Related terms

* injecter

#### Descendants

* → Romanian: injecție
* → Turkish: enjeksiyon

### Further reading

* “injection”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.