IGNITOR is the Italian name for a nuclear research project of magnetic confinement fusion, developed by ENEA Laboratories in Frascati. Construction (in Russia) is not complete.
An ignitor is a device used to trigger an explosive reaction.
An ignitor may also be an electrical device that ignites gaseous fuel in an oven or a furnace. Two styles, spark gap and resistive element, are in common use.
An ignitor is a device used to initiate combustion in a gas turbine engine during 'light up'