a whirling motion
121Marilyn Monroe — Monroe in The …
122Magnus effect — The Magnus effect, demonstrated on a ball. v represents the wind velocity, the arrow F the resulting force towards the side of lower pressure. The Magnus effect is the phenomenon whereby a spinning object flying in a fluid creates a whirlpool of… …
123dance, Western — Introduction history of Western dance from ancient times to the present and including the development of ballet, the waltz, and various types of modern dance. The peoples of the West of Europe and of the countries founded through… …
124stroboscope — stroboscopic /stroh beuh skop ik, strob euh /, stroboscopical, adj. stroboscopy /streuh bos keuh pee/, n. /stroh beuh skohp , strob euh /, n. 1. a device for studying the motion of a body, esp. a body in rapid revolution or vibration, by making… …
125Vortex — A vortex (pl. vortices ) is a spinning, often turbulent, flow of fluid. Any spiral motion with closed streamlines is vortex flow. The motion of the fluid swirling rapidly around a center is called a vortex. The speed and rate of rotation of the… …
126Sling (weapon) — A sling is a projectile weapon typically used to throw a blunt projectile such as a stone. It is also known as the shepherd s sling.A sling has a small cradle or pouch in the middle of two lengths of cord. The sling stone is placed in the pouch.… …
127turn — [tʉrn] vt. [ME turnen < OE turnian & OFr turner, tourner, both < L tornare, to turn in a lathe, turn < tornus, lathe < Gr tornos, lathe, carpenter s compasses, akin to terein, to bore through: for IE base see THROW] I to cause to… …
128Vortex — Vor tex, n.; pl. E. {Vortexes}, L. {Vortices}. [L. vortex, vertex, icis, fr. vortere, vertere, to turn. See {Vertex}.] [1913 Webster] 1. A mass of fluid, especially of a liquid, having a whirling or circular motion tending to form a cavity or… …
