injector(redirected from pressure injector)
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tr.v. in·ject·ed, in·ject·ing, in·jects
1. To force or drive (a fluid) into something: inject fuel into an engine cylinder; inject air into a liquid mixture.
a. To introduce (a drug or vaccine, for example) into a body part, especially by means of a syringe.
b. To treat by means of injection: injected the patient with digitalis.
3. To introduce into conversation or consideration: tried to inject a note of humor into the negotiations.
4. To place into circulation: inject money into the economy.
5. To place into an orbit or trajectory: inject a satellite into geosynchronous orbit.
6. Physics To cause (a beam of particles, for example) to strike a target.
[Latin inicere, iniect-, to throw in : in-, in; see in-2 + iacere, to throw; see yē- in Indo-European roots.]
1. a person or thing that injects
2. (Automotive Engineering) a device for spraying fuel into the combustion chamber of an internal-combustion engine
3. (Mechanical Engineering) Also: inspirator a device for forcing water into a steam boiler