duct

plural ducts

1. A pipe, tube or canal which carries gas or liquid from one place to another.

   heating and air-conditioning ducts

   1 more example

   The three motors on each bogie are force ventilated from a blower mounted in the adjacent nose-end compartment of the superstructure, the air being led by ducts and flexible bellows connections to the air inlet at the commutator end of the motor.

   1958 June 28, “Main-Line Diesel-Electric Locomotives for the Eastern Region”, in Railway Magazine, page 394

   1. An enclosure or channel for electrical cable runs, telephone cables, or other conductors.
   2. anatomyA vessel for conveying lymph or glandular secretions such as tears or bile.
   3. biologyA tube or elongated cavity (such as a xylem vessel) for conveying water, sap, or air.
2. natural sciencesA layer (as in the atmosphere or the ocean) which occurs under usually abnormal conditions and in which radio or sound waves are confined to a restricted path.
3. obsoleteGuidance, direction.

   […] otherwise to express His care and love to mankind, viz., in giving and consigning to them His written word for a rule and constant director of life, not leaving them to the duct of their own inclinations.

   1650, Henry Hammond, Of the reasonableness of Christian religion

present singular third person ducts · participle present ducting · participle past ducted · past ducted

1. transitiveTo enclose in a duct.
2. transitiveTo channel something (such as a gas) or propagate something (such as radio waves) through a duct or series of ducts.