[ tahl-veg, -veyk ]
/ ˈtɑl vɛg, -veɪk /
a line, as drawn on a map, connecting the lowest points of a valley.
Chiefly International Law. the middle of the main navigable channel of a waterway that serves as a boundary line between states.
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Examples from the Web for thalweg
The thalweg has been frequently confirmed as the accepted boundary where no conventions to the contrary existed.International Law|George Grafton Wilson and George Fox Tucker
British Dictionary definitions for thalweg
/ (ˈtɑːlvɛɡ) /
noun geography rare
the longitudinal outline of a riverbed from source to mouth
the line of steepest descent from any point on the land surface
Word Origin for thalweg
C19: from German, from Thal valley + Weg way, path
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
Word Origin and History for thalweg
Online Etymology Dictionary, © 2010 Douglas Harper
Science definitions for thalweg
[ täl′vĕg′ ]
The line defining the lowest points along the length of a river bed or valley, whether underwater or not.
A subterranean stream following a course similar to that of an overlying surficial stream.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.