Canal ¹

Definition: An artificial channel filled with water and designed for navigation, or for irrigating land, etc.

Canal ²

Definition: A tube or duct; as, the alimentary canal; the semicircular canals of the ear.

canal ³

Definition: long and narrow strip of water made for boats or for irrigation

canal ⁴

Definition: a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance; "the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snake''s fangs"

canal ⁵

Definition: (astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion

canal ⁶

Definition: provide (a city) with a canal