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water-parting

ˈwater-ˌparting
  = watershed 1. (See quot. 1877.)

1859 R. F. Burton Centr. Afr. in Jrnl. Geog. Soc. XXIX. 26 A similar expanse of stony ridges and uplands forming the great western waterparting. 1877 Huxley Physiogr. 18 To avoid this double use of the word ‘watershed’ the term ‘water-parting’ has been introduced as the English equivalent of the German Wasserscheide. 1901 Q. Rev. July 16 The water-parting between the systems of Lake Chad, the Niger, and the Congo.

Oxford English Dictionary

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