Water screw : A screw propeller.

Example:


Taxonomy
Archimedes' screw, Archimedes screw, Archimedes, screws, Oleson, casing, John Peter, Roman, free encyclopedia, Sennacherib, Water Screw, Technology, Invention, History, Greek, archimedean screw, pipe, tube.

Defination from the web:
water leaking from the top section of the screw leaks into the previous one and so on, so a sort of ... The design of the everyday Greek and Roman water screw, in contrast to the heavy bronze device of Sennacherib, with its problematic drive chains, has a powerful simplicity. ...