undertow(redirected from undertows)
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1. the seaward undercurrent following the breaking of a wave on the beach
2. any strong undercurrent flowing in a different direction from the surface current
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A subsurface seaward movement by gravity flow of water carried up on a sloping beach by waves or breakers.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.