Headwater

• (n.) The source and upper part of a stream; -- commonly used in the plural; as, the headwaters of the Missouri.
Found on http://thinkexist.com/dictionary/meaning/headwater/

Headwater

Head'wa`ter noun The source and upper part of a stream; -- commonly used in the plural; as, the headwaters of the Missouri.
Found on http://www.encyclo.co.uk/webster/H/22

Headwater

Referring to the source of a stream or river
Found on http://www.encyclo.co.uk/local/21804
No exact match found