burner; combustor
Technical term for a device that burns fuel, such as a gas burner or a combustor in a jet engine.
このガスコンロの燃焼器は掃除が簡単だ。
The burner on this gas stove is easy to clean.
The combustor of a jet engine must withstand high temperatures.
Compound of 燃焼 (combustion) + 器 (device). A straightforward technical coinage.