a. 阿基米德的

Archimedean \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.
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