Archimedes' screw(redirected from Cochlias)
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See Archimedean screw.
Archimedes' screw(ˌɑːkɪˈmiːdɪən; -mɪˈdiːən) or
(Mechanical Engineering) an ancient type of water-lifting device making use of a spiral passage in an inclined cylinder. The water is raised when the spiral is rotated
a device consisting essentially of a spiral passage within an inclined cylinder for raising water to a height when rotated.