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4 definitions found
 for injection
From The Collaborative International Dictionary of English v.0.48 :

  Injection \In*jec"tion\, n. [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.
        [1913 Webster]
  
     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. --Mayne.
        [1913 Webster]
  
     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.
            [1913 Webster]
  
     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.
            [1913 Webster]
  
     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.
        [1913 Webster +PJC]

From WordNet (r) 3.0 (2006) :

  injection
      n 1: the forceful insertion of a substance under pressure
      2: any solution that is injected (as into the skin) [syn:
         injection, injectant]
      3: the act of putting a liquid into the body by means of a
         syringe; "the nurse gave him a flu shot" [syn: injection,
         shot]

From Moby Thesaurus II by Grady Ward, 1.0 :

  137 Moby Thesaurus words for "injection":
     Earth insertion, LEM, LM, antitoxin, apogee, aside,
     attitude-control rocket, bag, ballistic capsule, bang, booster,
     booster dose, booster shot, brewing, burn, capsule, deck,
     deep-space ship, docking, docking maneuver, dose, draft, drench,
     drenching, dropping, drug packet, ducking, dunking, embedment,
     encroachment, entrance, entrenchment, episode, ferry rocket, fix,
     fuel ship, graft, grafting, hit, hypodermic, hypodermic injection,
     imbruement, imbuement, impaction, impactment, impingement,
     implantation, imposition, impregnation, incursion, infiltration,
     infix, infixion, influx, infringement, infusion, inoculation,
     inroad, insert, insertion, insinuation, intercalation,
     interference, interjection, interlineation, interlocution,
     interloping, interpolation, interposition, interposure,
     interruption, intervention, introduction, intromission, intrusion,
     invasion, irruption, jet injection, leaching, lixiviation,
     lunar excursion module, lunar module, maceration, mainlining,
     manned rocket, module, moon ship, multistage rocket,
     narcotic injection, narcotic shot, obiter dictum, obtrusion, orbit,
     overdose, parenthesis, parking orbit, penetration, percolation,
     perfusion, perigee, permeation, popping, portion, potion, pulping,
     reentry, remark, rocket, saturation, seething, shooting up, shot,
     shuttle rocket, side remark, skin-popping, soak, soakage, soaking,
     soft landing, sopping, souse, sousing, space capsule,
     space docking, space rocket, spacecraft, spaceship, steeping,
     tessellation, tossing-in, transplant, transplantation, trespass,
     trespassing, unlawful entry, vaccination, vaccine
  
  

From The Free On-line Dictionary of Computing (18 March 2015) :

  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)
  

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