Definition of downcomer in English:

downcomer

noun

  • A pipe for the downward transport of water or gas from the top of a furnace or boiler.

    • ‘The size and number of downcomers installed varies from one type of boiler to another, but downcomers are installed in all naval boilers.’
    • ‘They responded by putting forward a new plan - using the tides of the Huangpu to wash the existing downcomers and main sewer regularly.’

Pronunciation:

downcomer

/ˈdounˌkəmər/