Archimedean drill noun

A drill in which to-and-fro movement of a nut on a helix causes alternating rotary motion of the bit

Archimedean screw noun

A machine for raising water, etc, in its simplest form a tube bent spirally turning on its axis

Archimedean spiral noun

The curve described by a point moving uniformly along a uniformly revolving radius vector, its polar equation being r=αθ

principle of Archimedes or Archimedes' principle

The principle that a body weighed when immersed wholly or partly in a fluid shows a loss of weight equal to the weight of fluid it displaces