thalwegPronunciation: /ˈtɑːlvɛg, ˈθɑːlwɛg/Definition of thalweg noun Geology a line connecting the lowest points of successive cross-sections along the course of a valley or river. Origin: mid 19th century: from German, from obsolete Thal 'valley, dale' + Weg 'way'thalweg in other Oxford dictionaries Definition of thalweg in the US English dictionary
