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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| whirlpool (ˈwɜːlˌpuːl) | |
| —n | |
| 1. | a powerful circular current or vortex of water, usually produced by conflicting tidal currents or by eddying at the foot of a waterfall |
| 2. | something resembling a whirlpool in motion or the power to attract into its vortex |
| 3. | short for whirlpool bath |
whirlpool (wûrl'p l') Pronunciation Key
A rapidly rotating current of water or other liquid that sucks everything near it toward its center. The meeting of two tides can create a whirlpool. |
whirlpool
rotary oceanic current, a large-scale eddy that is produced by the interaction of rising and falling tides. Similar currents that exhibit a central downdraft are termed vortexes and occur where coastal and bottom configurations provide narrow passages of considerable depth. Slightly different is vortex motion in streams; at certain stages of turbulent flow, rotating currents with central updrafts are formed. These are called kolks, or boils, and are readily visible on the surface
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