injector

[in-jek-ter]
noun
1.
a person or thing that injects.
2.
Machinery.
a.
a device for injecting feedwater into a boiler against high pressure by means of a jet of steam.
b.
Also called fuel injector. a mechanism consisting of a pump, valves, and nozzles for spraying fuel into the cylinders of an internal-combustion engine.

Origin:
1735–45; inject + -or2

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World English Dictionary
injector (ɪnˈdʒɛktə)
 
n
1.  a person or thing that injects
2.  a device for spraying fuel into the combustion chamber of an internal-combustion engine
3.  Also: inspirator a device for forcing water into a steam boiler

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The first plasma injector began operating a year ago.
Then diesel fuel from another tank is injected directly into the chamber using a low-pressure fuel injector.
He had actually been running the electron injector at that kilovoltage for the past eight hours.
Injector lines using this material exhibit a significantly higher failure rate.
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