Definitions for: Injection

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

Webster (1913) Definition: 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

Injection condenser. See under Condenser.

Injection pipe, the pipe through which cold water is
through into the condenser of a steam engine.

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

f x = (x, 0).

fst (x,y) = x.

Synonyms: injectant, shot

See Also: insertion, intradermal injection, intramuscular injection, intravenous injection, introduction, intromission, medical aid, medical care, solution, subcutaneous injection

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