VORTEX

noun (plural vortices; also ~es) see: vertex Date: 1652 something that resembles a whirlpool , 2. a mass of fluid (as a liquid) with a whirling or circular motion that tends to form a cavity or vacuum in the center of the circle and to draw toward this cavity or vacuum bodies subject to its action, a region within a body of fluid in which the fluid elements have an angular velocity