[ druhm-lin ]
/ ˈdrʌm lɪn /

noun Geology.

a long, narrow or oval, smoothly rounded hill of unstratified glacial drift.

Origin of drumlin

1825–35; drum2 + -lin, variant of -ling1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for drumlin


/ (ˈdrʌmlɪn) /


a streamlined mound of glacial drift, rounded or elongated in the direction of the original flow of ice

Word Origin for drumlin

C19: from Irish Gaelic druim ridge + -lin -ling 1
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

Science definitions for drumlin


[ drŭmlĭn ]

An extended, oval hill or ridge of compacted sediment deposited and shaped by a glacier. Drumlins are typically about 30 m (98 ft) high and are longer than they are wide. They have one steep and one gentle slope along their longest axis, which is parallel to the direction of the glacier's movement. The steepest slope faces the direction from which the glacier originated, and the gentler slope faces the direction in which the glacier was advancing.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.