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
In an organ flue pipe, the opening between the lower lip and the languet.
A pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace).
An enclosed passageway in which to direct air or other gaseous current along.