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 aëriform 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.
