Definition from Wiktionary, the free dictionary
Jump to: navigation, search
See also: înjection


An injection


Borrowed from Middle French injection, from Latin iniectio.


  • IPA(key): /ɪn.ˈdʒɛk.ʃən/
  • Hyphenation: in‧jec‧tion
  • Rhymes: -ɛkʃən


injection (plural injections)

  1. A specimen prepared by injection.
  2. The act of injecting, or something that is injected.
  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 addition of money to someone, or to a business.
    The troubled business received a much-needed cash injection.
  6. (mathematics) A relation on sets (X,Y) that associates each element of Y with at most one element of X.
  7. (programming) 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
  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 fX → Y such that f(a) = f(b) implies a = b for any a, b in the domain.
  10. (specifically, medicine) Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle.
  11. (steam engines) The act of throwing cold water into a condenser to produce a vacuum.
  12. (steam engines) The cold water thrown into a condenser to produce a vacuum.


Derived terms[edit]

Related terms[edit]


See also[edit]




Borrowed from Latin iniectiō, iniectiōnem.


injection f (plural injections)

  1. injection

Related terms[edit]

Further reading[edit]