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claypan

[kley-pan]
noun
  1. hardpan(def 1).
  2. Australian. a shallow, normally dry depression in the ground that holds water after a heavy rain.
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Origin of claypan

An Americanism dating back to 1830–40; clay1 + pan1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for claypan

claypan

noun
  1. a layer of stiff impervious clay situated just below the surface of the ground, which holds water after heavy rain
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012