from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A pipe or duct used, especially in ancient times, to convey hot air or steam for heating purposes.
from the GNU version of the Collaborative International Dictionary of English
- n. A pipe or duct used to convey hot air or steam.
from The Century Dictionary and Cyclopedia
- n. A pipe or duct used to convey hot air or steam from a furnace to the apartments of a house.
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