duct

duct /d'ʌkt/ (ducts)
1 [N-COUNT] usu with supp
A duct is a pipe, tube, or channel which carries a liquid or gas.
...a big air duct in the ceiling.
2 [N-COUNT] with supp
A duct is a tube in your body which carries a liquid such as tears or bile.
...tear ducts.

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