head wall
- a cliff or steep slope rising at one end of a glaciated valley.
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Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
headwall
[hĕd′wôl′]
- A steep slope or precipice rising at the head of a valley or glacial cirque.
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The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.