from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A stream that is a source of a river.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
streamthat is the sourceof a river
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a stream that forms the source of a river
Sorry, no etymologies found.
Geographynote: landlocked; straddles crest of the Nile-Congo watershed; the Kagera, which drains into Lake Victoria, is the most remote headstream of the White Nile
Burundilandlocked; straddles crest of the Nile-Congo watershed; the Kagera, which drains into Lake Victoria, is the most remote headstream of the White Nile
Its fourth, smaller headstream is known as the Clear Fork.
It is further divided into the eucrenon (spring or boil zone) and the hypocrenon (brook or headstream zone).
Geography - note: landlocked - entire coastline along the Red Sea was lost with the de jure independence of Eritrea on 24 May 1993; the Blue Nile, the chief headstream of the Nile by water volume, rises in T'ana Hayk
Kagera, which drains into Lake Victoria, is the most remote headstream of the White Nile
Nile, the chief headstream of the Nile by water volume, rises in
In little Lake Mohrya, located near the upper Lualaba River, a southern headstream of the Congo, Cameron found numerous pile dwellings, whose owners moved about in dug-out canoes and cultivated fields on land,  as did their Swiss confrères of twenty centuries ago.
Terek River, beyond whose headstream lies the Dariel defile (7503 feet or 2379 meters), which continues the natural depression across to the short southern slope.
There each river valley shows three characteristic anthropo-geographical sub-divisions -- the active seaports and tide-water tillage of its lower course, the contrasted agriculture of its hilly course, the upland farms, waterpower industries and mines of its headstream valleys, each landscape giving its population distinctive characteristics.