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1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 Down·com·er n. A pipe to conduct something downwards; specif.: (a) Iron Manuf. A pipe for leading the hot gases from the top of a blast furnace downward to the regenerators, boilers, etc. (b) Steam Engin. In some water-tube boilers, a tube larger in diameter than the water tubes to conduct the water from each top drum to a bottom drum, thus completing the circulation.