archimedes Definition

circa 287—212 b.c. Greek mathematician and inventor

a device made of a tube bent spirally around an axis or of a broad-threaded screw encased by a cylinder and used to raise water

a plane curve that is generated by a point moving away from or toward a fixed point at a constant rate while the radius vector from the fixed point rotates at a constant rate and that has the equation ρ = a θ in polar coordinates