knickpoint

World English Dictionary
knickpoint or esp (US) nickpoint (ˈnɪkˌpɔɪnt)
 
n
a break in the slope of a river profile caused by renewed erosion by a rejuvenated river
 
[C20: partial translation of German Knickpunkt, from knicken to bend + Punktpoint]
 
nickpoint or esp (US) nickpoint
 
n
 
[C20: partial translation of German Knickpunkt, from knicken to bend + Punktpoint]

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Dictionary.com's 21st Century Lexicon
Main Entry:  knickpoint
Part of Speech:  n
Definition:  a place in a river where its gradient changes and it begins to flow more steeply; a sharp drop in streambed elevation
Example:  The greater the volume of water flowing over a knickpoint, the faster it cuts upstream.
Etymology:  German knickpunkt 'bend, kink' + 'point'
Dictionary.com's 21st Century Lexicon
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