[ es-ker ]
See synonyms for esker on
  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

Words Nearby esker Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use esker in a sentence

British Dictionary definitions for esker


eskar (ˈɛskɑː, -kə)

/ (ˈɛskə) /

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

Origin of 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

Scientific definitions for 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.