canal
noun
1. (astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion
Definition categories: object, channel
2. a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance
- the alimentary canal
Similar word(s): channel, duct
Definition categories: body, passage, passageway
3. long and narrow strip of water made for boats or for irrigation
Definition categories: man–made, watercourse, waterway