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amphidromic point

[am-fi-drom-ik, am-]
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noun Oceanography.
  1. a point of almost zero tidal fluctuation on the ocean surface, represented on a chart of cotidal lines by a point from which these lines radiate.
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Origin of amphidromic point

1935–40; < Greek amphídrom(os) running both ways + -ic; see amphi-, -drome
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018