Definition of pressure lamp in US English:

pressure lamp

noun

  • A portable oil or kerosene lamp in which the fuel is forced up into the mantle or burner by air pressure in the reservoir, which can be increased by pumping with a plunger.

    • ‘The day length was 14 h and additional illumination was provided by sodium high pressure lamps.’
    • ‘The PT Ultra Prima Cemerlang factory uses thorium nitrate in its production of socks for pressure lamps (petromax).’