drumlin definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any one of a series of low, flattened, oval mounds or hills formed by an advancing glacier
Origin: ; from Irish druim, narrow ridge plush -lin, diminutive suffix ; from -ling
drumlin definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
An elongated hill or ridge of glacial drift.
Origin: From drum, ridge, from Irish Gaelic druim, back, ridge, from Old Irish.
drumlin - Science Definition
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.