injection

Noun
US[in-jek-shuhn]/ˌɪnˈdʒɛkʃən/3 syllables
Synonyms: injectantshot

Open English WordNet

Noun (3)injections

  1. the forceful insertion of a substance under pressureType of insertion, introductionKinds epidural injection
  2. any solution that is injected (as into the skin)Synonyms: injectantType of solution
  3. the act of putting a liquid into the body by means of a syringe“the nurse gave him a flu shot”Synonyms: shotType of medical care, medical aidKinds intradermal injection, intramuscular injection, intravenous injection, subcutaneous injection
Word of the day · Nov 15About this word

a state or condition markedly different from the norm

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Translations

Noun act of injecting, or something injected

Spanish
inyección
French
injection
German
Injektion
Italian
iniezione
Portuguese
injeção
Turkish
enjeksiyon
Russian
инъе́кция inʺjékcija
Arabic
حُقْنَة ḥuqna
Japanese
注射 chūsha
19 more languages
Polish
zastrzyk
Swedish
injektion
Greek
ένεση énesi
Korean
주사 jusa
Indonesian
suntikan
Hungarian
injekció
Portuguese (PT)
injeção
Catalan
injecció
Czech
injekce
Danish
injektion
Esperanto
injekto
Finnish
ruiske
Georgian
ინექცია inekcia
Hebrew
זְרִיקָה z'riká
Icelandic
innspýting
Norwegian
injeksjon
Romanian
injecție
Serbo-Croatian
injekcija
Swahili
sindano

Noun set theory

French
injection
German
Injektion
Italian
iniezione
Russian
инъе́кция inʺjékcija
Chinese
单射 dānshè
Japanese
単射 tansha
Polish
iniekcja
Swedish
injektion
Hungarian
injekció
Chinese (Trad.)
單射 dānshè
3 more languages
Czech
injekce
Finnish
injektio
Romanian
injecție

The main translation for each meaning, from the langtolang.com multilingual dictionary. Each word links to its full entry there.

Webster's Dictionary (1913)

In·jec′tion noun

Origin: L. injectio: cf. F. injection.

1. The act of injecting or throwing in; — applied particularly to the forcible insertion of a liquid or gas, by means of a syringe, pump, etc.

2. That which is injected; especially, a liquid inserted thrown into a cavity of the body by a syringe or pipe; a clyster; an enema. Robert Gray Mayne

3. Anatomy (a) The act or process of filling vessels, cavities, or tissues with a fluid or other substance. (b) A specimen prepared by injection.

4. Steam Eng. (a) The act of throwing cold water into a condenser to produce a vacuum. (b) The cold water thrown into a condenser.

Injection cock, or Injection valve Steam Eng., the cock or valve through which cold water is admitted into a condenser. — Injection condenser. See under Condenser. — Injection pipe, the pipe through which cold water is through into the condenser of a steam engine. — fuel injection, a method of inserting fuel into internal-combustion engines by directly forcing the liquid fuel into the combustion chamber at an appropriate point in the piston cycle; in contrast to carburetion, in which an air-fuel mixture is drawn in by the downward stroke of the piston.

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54 · with additions: +PJC

Free On-line Dictionary of Computing

injection

1.<mathematics> A function, f : A -> B, is injective or one-one, or is an injection, if and only if

for all a, b in A, f(a) = f(b) => a = b.

I.e. no two different inputs give the same output (contrast many-to-one). This is sometimes called an embedding. Only injective functions have left inverses f' where f'(f(x)) = x, since if f were not an injection, there would be elements of B for which the value of f' was not unique. If an injective function is also a surjection then is it a bijection.

2.<reduction> An injection function is one which takes objects of type T and returns objects of type C(T) where C is some type constructor. An example is

f x = (x, 0).

The opposite of an injection function is a projection function which extracts a component of a constructed object, e.g.

fst (x,y) = x.

We say that f injects its argument into the data type and fst projects it out.

(1995-03-14)

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