kəˈnæl n. 1 an
artificial waterway for inland navigation or irrigation. 2
any of
various tubular ducts in a
plant or
animal, for carrying
food,
liquid, or
air. 3 Astron. any of a
network of
apparent linear markings on
the planet Mars,
which are observed
from earth but
not at close
range. øcanal
boat a long
narrow boat for
use on canals. canal ray a
beam of
positive ions
moving through a bored
hole in the
cathode of a high-vacuum
tube. [ME f. OF (earlier chanel) f. L canalis or
It. canale]