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a movement in a stream of air, water, or other fluid in which the current doubles back on itself causing a miniature whirlwind or whirlpool
Mary Baker. 1821--1910, US religious leader; founder of the Christian Science movement (1866)
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A vortexlike motion of a fluid running contrary to the main current.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
i. A local irregularity in wind-producing gusts and lulls. Small-scale eddies produce turbulent conditions.
ii. The more or less circular motion produced by an obstruction in the path of moving fluid, such as against a streamlined flow on an uneven or nonstreamlined surface or in an area where there is a sudden rise in pressure. In fluids, any circulation drawing its energy from a flow of a much larger scale and brought about by pressure irregularities.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved