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headwaters

[hed-waw-terz, -wot-erz] /ˈhɛdˌwɔ tərz, -ˌwɒt ərz/
plural noun
1.
Sometimes, headwater. the upper tributaries of a river.
Origin
1525-1535
1525-35; head + waters, plural of water
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for headwaters
  • Glacier's water can be considered the headwaters of the entire continent.
  • The headwaters are unimpaired, with the exception of a number of reservoirs.
  • Reaching the headwaters, the soldiers disembarked and marched either along the river or on the canyon rim overlooking it.
  • Determine whether your watershed is a headwaters watershed or whether other watersheds are present upstream of your watershed.
  • National and regional spatial coverages are known to underestimate the extent of headwaters.
British Dictionary definitions for headwaters

headwaters

/ˈhɛdˌwɔːtəz/
plural noun
1.
the tributary streams of a river in the area in which it rises; headstreams
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
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Word Origin and History for headwaters
n.

1530s; see head (n.) + water (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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