[bak-shawr, -shohr]
noun Geology.
the zone of the shore or beach above the high-water line, acted upon only by severe storms or exceptionally high tides.
the area immediately adjacent to a sea cliff.
berm ( def 3 ).

1915–20; back1 + shore1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
backshore   (bāk'shôr')  Pronunciation Key 
The area of a shore that lies between the average high tide mark and the vegetation. The backshore is affected by waves only during severe storms. Compare foreshore.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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