esker

[es-ker]
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noun Geology.
  1. a serpentine ridge of gravelly and sandy drift, believed to have been formed by streams under or in glacial ice.

Origin of esker

First recorded in 1850–55, esker is from the Irish word eiscir ridge of mountains
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for esker

esker

eskar (ˈɛskɑː, -kə)

noun
  1. a long winding ridge of gravel, sand, etc, originally deposited by a meltwater stream running under a glacierAlso called: os

Word Origin for esker

C19: from Old Irish escir ridge
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

Word Origin and History for esker
n.

"deposit left by a glacial stream," 1852, from Irish eiscir "ridge of gravel."

Online Etymology Dictionary, © 2010 Douglas Harper

esker in Science

esker

[ĕskər]
  1. A long, narrow, steep-sided ridge of coarse sand and gravel deposited by a stream flowing in or under a melting sheet of glacial ice. Eskers range in height from 3 m (9.8 ft) to more than 200 m (656 ft) and in length from less than 100 m (328 ft) to more than 500 km (310 mi).
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.