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Archimedean screw
(redirected from Archimedean screws)

    Also found in: Dictionary/thesaurus 0.03 sec.

Archimedean screw

 or Archimedes' screw

Machine for raising water, said to have been invented by Archimedes for removing water from the hold of a large ship. One form consists of a circular pipe enclosing a helix and inclined at an angle of about 45°, with its lower end dipped in the water; rotation of the device lifts the water in the pipe. Other forms consist of a helix revolving in a fixed cylinder or a helical tube wound around a shaft.



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