injector

noun6

1. •
   One who, or that which, injects something.
2. •
   One who injects (himself or herself with) psychoactive drugs.
3. •
   Any of various devices that are used to inject something.
4. •
   An apparatus by which a stream of water is forced into a steam boiler.
5. •
   Any of the one or more devices in a fuel injection system that create the spray of fuel.
6. •
   An object that realizes a dependency injection.