In-jēc'tion, n.

(in-jěk'shun), n. [Lat. injectio, Fr. injection, Sp. inyeccion, It. iniezione.]

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, &c.
2. That which is injected; especially, a liquid medicine thrown into a cavity of the body by a syringe or pipe; when intended to be introduced at the rectum, it is called a clyster. Mayne.
3. (Anat.) The act of filling the vessels of an animal body with some colored substance, in order to render visible their figures and ramifications.
4. Hence, a preserved specimen of some part of an animal body, thus injected.
5. (Steam-eng.) (a.) The act of throwing cold water into a condenser. (b.) The cold water thrown into a condenser to produce a vacuum.