in meteorology, a whirlwind, or sudden, rapid, and violent motion of the air in gyres, or circles.

Vortex is also used for an eddy or whirlpool; or a body of water, in certain seas or rivers, which run rapidly around, forming a sort of cavity in the middle.

the Cartesian philosophy, is a system or collection of particles of matter moving the same way, and round the same axis.