injection

English Online Dictionary. What means injection‎? What does injection mean?

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^(key): /ɪnˈd͡ʒɛk.ʃən/
• Hyphenation: in‧jec‧tion
• Rhymes: -ɛkʃən

Noun

injection (countable and uncountable, plural injections)

1. The act of injecting, or something that is injected.
2. A specimen prepared by injection.
3. (category theory) A morphism from either one of the two components of a coproduct to that coproduct.
4. (construction) The act of inserting materials like concrete grout or gravel by using high pressure pumps.
5. (figuratively) The supply of additional funding to a person or a business.

6. (mathematics) A relation on sets (X,Y) that associates each element of Y with at most one element of X.

   Synonym: injective function

7. (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.

8. (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.
9. (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.
10. (medicine) Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle.
11. (medicine) Congestion (of a body part, with blood or other fluid), such as hyperemia.

12. (internal combustion engines) Fuel injection: the pressurized introduction of fuel into a cylinder.

13. (steam engines) The act of throwing cold water into a condenser to produce a vacuum.
14. (steam engines) The cold water thrown into a condenser to produce a vacuum.

Hyponyms

Derived terms

Related terms

• inject

Translations

See also

References

• injection on Wikipedia.Wikipedia

French

Etymology

Learned borrowing from Latin iniectiō.

Pronunciation

• IPA^(key): /ɛ̃.ʒɛk.sjɔ̃/

Noun

injection f (plural injections)

1. injection
2. (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.