\Ar`chi*me*de"an\, a. [L. Archimedeus.]
Of or pertaining to Archimedes, a celebrated Greek
philosopher; constructed on the principle of Archimedes'
screw; as, Archimedean drill, propeller, etc.
{Archimedean screw}, or {Archimedes' screw}, an instrument,
   said to have been invented by Archimedes, for raising
   water, formed by winding a flexible tube round a cylinder
   in the form of a screw. When the screw is placed in an
   inclined position, and the lower end immersed in water, by
   causing the screw to revolve, the water is raised to the
   upper end. --Francis.