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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
in·jec·tion    Audio Help   [in-jek-shuhn] Pronunciation Key
–noun
1.the act of injecting.
2.something that is injected.
3.a liquid injected into the body, esp. for medicinal purposes, as a hypodermic or an enema.
4.state of being hyperemic or bloodshot.
5.Mathematics. a one-to-one function.
6.Also called insertion. Aerospace. the process of putting a spacecraft into orbit or some other desired trajectory.

[Origin: 1535–45; < L injectiōn- (s. of injectiō). See inject, -ion]
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
Encyclopædia Britannica, Inc.
injection

To learn more about injection visit Britannica.com

© 2008 Encyclopædia Britannica, Inc.
American Heritage Dictionary - Cite This Source - Share This
in·jec·tion    Audio Help   (ĭn-jěk'shən)  Pronunciation Key 
n.  
  1. The act of injecting.
  2. Something that is injected, especially a dose of liquid medicine injected into the body.
  3. Mathematics A function that is one-to-one.


[Sense 3, in-2 + (pro)jection.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
WordNet - Cite This Source - Share This
injection

noun
1. the forceful insertion of a substance under pressure 
2. any solution that is injected (as into the skin) 
3. the act of putting a liquid into the body by means of a syringe; "the nurse gave him a flu shot" 

WordNet® 3.0, © 2006 by Princeton University.
Kernerman English Multilingual Dictionary - Cite This Source - Share This
inˈjection [-ʃən] noun
Example: The medicine was given by injection; She has regular injections of insulin.
Arabic: حَقْن
Chinese (Simplified): 注射
Chinese (Traditional): 注射
Czech: injekce
Danish: indsprøjtning
Dutch: injectie
Estonian: süst
Finnish: ruiske
French: piqûre
German: die Infektion
Greek: ένεση
Hungarian: injekció
Icelandic: stunga, sprauta, sprautuskammtur
Indonesian: suntikan
Italian: iniezione
Japanese: 注射
Korean: 주사
Latvian: injekcija; injicēšana
Lithuanian: injekcija
Norwegian: sprøyte, innsprøyting
Polish: zastrzyk
Portuguese (Brazil): injeção
Portuguese (Portugal): injecção
Romanian: injecţie
Russian: инъекция
Slovak: injekcia
Slovenian: injekcija
Spanish: inyección
Swedish: injektion
Turkish: iğne, enjeksiyon
See also: inject

Kernerman English Multilingual Dictionary, © 2000-2006 K Dictionaries Ltd.
The American Heritage Science Dictionary - Cite This Source - Share This
injection    Audio Help   (ĭn-jěk'shən)  Pronunciation Key 
  1. A substance that is introduced into a organism, especially by means of a hypodermic syringe, as a liquid into the veins or muscles of the body.
  2. A function that maps each member of one set (the domain) to exactly one member of another set (the range). Compare bijection, surjection.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Free On-line Dictionary of Computing - Cite This Source - Share This

injection
1. 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. 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)

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Injection

In*jec"tion\, n. [L. injectio : cf.F. injection.]

1. The act of injecting or throwing in; -- applied particularly to the forcible throwing in of a liquid, or a["e]riform body, by means of a syringe, pump, etc.

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

3. (Anat.) (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.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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