igniter
nounUK /ɪɡˈnaɪtə/
US /ɪɡˈnaɪtər/
A thing that makes a fire or spark start.
He used an igniter to light the campfire.
OTHER MEANINGS
2. A device that starts the fuel burning in an engine or rocket.
The rocket's igniter fired just before liftoff.
3. A small part in a machine that sets off an explosion or a charge.
The technician replaced the faulty igniter in the furnace.
4. A person or thing that stirs up strong feelings or action.
Her speech was an igniter for the whole movement.