downcomer.
A pipe to conduct something downwards.
Meaning & usage
A pipe to conduct something downwards. A large external pipe in a water-tube boiler, carrying unheated water from the steam drum down to the water drum as part of the circulation path.
A pipe to conduct something downwards. A pipe for leading the hot gases from the top of a blast furnace downward to the regenerators, boilers, etc.
Where this word comes from
From down + comer.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.