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[pree-gley-shuh l] /priˈgleɪ ʃəl/
adjective, Geology
prior to a given glacial epoch, especially the Pleistocene.
Origin of preglacial
1850-55; pre- + glacial Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for preglacial
  • In some instances, buried preglacial streams provide extensive groundwater resources.
  • preglacial fluvial sediments ma y underlie the glacial deposits in many of the preglacial valleys.
  • Broad outwash plains are located along the entire northern edge of the preglacial lakes.
  • Often preglacial valleys were filled with glacially derived sediment.
  • The preglacial physiographic provinces are divided by the type of bedrock.
  • They may have developed where preglacial streams had already eroded channels into the weaker parts of the bedrock.
  • Many islandlike remnants of preglacial soils remained after the glacial floods.
British Dictionary definitions for preglacial


formed or occurring before a glacial period, esp before the Pleistocene epoch
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
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Word Origin and History for preglacial

also pre-glacial, 1853, from pre- + glacial.

Online Etymology Dictionary, © 2010 Douglas Harper
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