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 aeriform 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, ∨ 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 1913.