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duct

noun [C]
 
 
/dʌkt/

Definition

a tube or pipe that carries liquid or air, especially in and out of buildings or through the body: Most office buildings have dozens of air ducts and vents. People with blocked tear ducts cannot cry.Vents and ventilation
(Definition of duct noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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