injector

American  

[in-jek-ter] / ɪnˈdʒɛk tər /

noun

1. a person or thing that injects.

2. Machinery.

   1. a device for injecting feedwater into a boiler against high pressure by means of a jet of steam.

   2. Also called fuel injector.  a mechanism consisting of a pump, valves, and nozzles for spraying fuel into the cylinders of an internal-combustion engine.

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injector British  

/ ɪnˈdʒɛktə /

noun

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

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Etymology

Origin of injector

First recorded in 1735–45; inject + -or ²

Example Sentences

In 2025, Ford took a $600 million charge for a fuel injector recall.

From Barron's • Apr. 10, 2026

Patients prescribed Wegovy will be able to self-administer the drug at home using a special pen injector device.

From BBC • Mar. 31, 2026

Thanks to the development of an MRI-compatible microrobot injector, the scientists were able to assemble "particle trains," aggregates of magnetizable microrobots.

From Science Daily • Feb. 14, 2024

Amneal Pharmaceuticals withdrew patents on its epinephrine injector.

From Salon • Feb. 2, 2024

She held the needle like a knife and swung the pen-like injector, then stopped just outside her thigh.

From "Sir Fig Newton and the Science of Persistence" by Sonja Thomas