noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   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.
2. 2
   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.

Etymology

From down + comer.

Related phrases

blast furnace

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.