headstream

[ hed-streem ]
/ ˈhɛdˌstrim /

noun

a stream that is the source, or one of the sources, of a river.

Origin of headstream

First recorded in 1810–20; head + stream

British Dictionary definitions for headstream

headstream
/ (ˈhɛdˌstriːm) /

noun

a stream that is the source or a source of a river