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caliduct

[kal-i-duhkt]
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noun
  1. a pipe or duct for conveying a heating medium, as hot air or steam.

Origin of caliduct

1645–55; < Latin cali(dus) warm + duct, modeled on aqueduct
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018