What does injector mean?
An injector is a device that introduces a substance into another system. Its best-known use is as a fuel injector in an internal-combustion engine, where it delivers fuel in carefully measured amounts at the correct moment. Other injectors can introduce air, water, chemicals, or medicines into pipes, chambers, or the human body. The term is especially associated with automotive engineering, where a faulty injector can cause poor performance, difficult starting, or uneven running. In medical and industrial contexts, it describes a specialized delivery device rather than the substance being delivered. Although an injector can sometimes refer to a person who administers an injection, the word is more commonly used for the device or machine component. It is a precise technical noun derived from the verb “inject” and the suffix “-or,” which traditionally indicates an agent or device performing an action.
nounA device or component that introduces a fluid, fuel, or other substance into a system, especially an internal-combustion engine. The word can also refer to a person or device that injects a substance.
- A device or component that injects fuel, air, water, chemicals, or another substance into a larger system, especially an engine or machine.
- A person or apparatus used to inject a substance into a body or other enclosed system.
"The mechanic replaced the faulty fuel injector."
"The technician cleaned each injector before testing the engine."
"The medical injector delivered the vaccine through a fine needle."
The standard plural of the noun.
"The inspection showed that two injectors were blocked."
A fuel injector must deliver the right amount of fuel at precisely the right moment—an invisible precision instrument that can decide whether an engine runs smoothly or stalls.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does injector come from?
Injector was formed in English from “inject” and the suffix “-or,” a development that became established during the nineteenth century. The verb “inject” comes from Latin injicere, meaning “to throw in,” formed from in- (“into”) and jacere (“to throw”). Related Latin-root words include “interject,” meaning to insert between, and “project,” meaning to throw forward.
How injector is actually used
The word is most common in technical contexts, particularly automotive engineering. It is usually countable, and 'fuel injector' is by far its most frequent compound.