duct

Short definition from Wiktionary

Noun

1. 1
   A pipe, tube or canal which carries gas or liquid from one place to another
2. 2
   A pipe, tube or canal which carries gas or liquid from one place to another: An enclosure or channel for electrical cable runs, telephone cables, or other conductors
3. 3
   A pipe, tube or canal which carries gas or liquid from one place to another: A vessel for conveying lymph or glandular secretions such as tears or bile
4. 4
   A pipe, tube or canal which carries gas or liquid from one place to another: A tube or elongated cavity (such as a xylem vessel) for conveying water, sap, or air
5. 5
   A 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
6. 6
   Guidance, direction

Verb

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