A tubular channel within the body.
An artificial waterway or artificially improved river used for travel, shipping, or irrigation.
One of the faint, hazy markings resembling straight lines on early telescopic images of the surface of Mars.
To dig an artificial waterway in or to (a place), especially for drainage
To travel along a canal by boat
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
a tube or elongated cavity (such as a xylem vessel) for conveying water, sap, or air
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
an enclosure or channel for electrical cable runs, telephone cables, or other conductors
to enclose in a duct
to channel something (such as a gas) or propagate something (such as radio waves) through a duct or series of ducts