injection

[in-jek-shuhn]
noun
1.
the act of injecting.
2.
something that is injected.
3.
a liquid injected into the body, especially 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; < Latin injectiōn- (stem of injectiō). See inject, -ion

postinjection, adjective
reinjection, noun
superinjection, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
injection (ɪnˈdʒɛkʃən)
 
n
1.  fluid injected into the body, esp for medicinal purposes
2.  something injected
3.  the act of injecting
4.  a.  the act or process of introducing fluid under pressure, such as fuel into the combustion chamber of an engine
 b.  (as modifier): injection moulding
5.  maths surjection See also bijection a function or mapping for which f(x) = f(y) only if x = y
 
in'jective
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

injection in·jec·tion (ĭn-jěk'shən)
n.

  1. The act of injecting a substance into a tissue, vessel, canal, or organ.

  2. Something that is injected, especially a dose of liquid medicine injected into the body.

  3. Congestion or hyperemia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
injection  [%PREMIUM_LINK%]     (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. Published by Houghton Mifflin. All rights reserved.
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FOLDOC
Computing Dictionary

injection definition


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, © Denis Howe 2010 http://foldoc.org
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Example sentences
Squeezing a monkey in a cage in order to give her an injection, or darting and
  anesthetizing a chimpanzee causes terror.
One of the reasons this system works is the ability to effectively mix the
  three components prior to injection into the mine.
The rats' rectal temperatures lowered after the injection, and the effect
  lasted for an hour and a half.
Blood tests measure the amount of specific antibodies circulating in the blood
  after an injection of the suspect substance.
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