injector

 
Pronunciation: /ɪnˈdʒɛktə/

noun

  • a person or thing that injects something.
  • (also fuel injector) (in an internal-combustion engine) the nozzle and valve through which fuel is sprayed into a combustion chamber.
  • (in a steam engine) a system of nozzles that uses steam to inject water into a pressurized boiler.