DictionarytributaryFeeding a larger stream
noun / adjective

tributary

TRIB-yuh-tair-ee/ˈtrɪbjəteri/

A stream flowing into a larger stream.

The narrow tributary flows into the larger river.

An elevated view of a narrow stream joining a much wider river, with natural current streaks visibly merging downstream rather than branching apart.
Etymology

Tributary first described someone or something owing tribute. Applied to rivers, the idea became “furnishing a subsidiary supply”: a smaller stream contributes water to a larger one.

In context

Town of Amherst, MA77:11
it's a intermittent tributary that flows into the Mill River The Mill River does not flow along the back of this property
Conservation Commission Meeting Feb 28, 2024

More examples

  • Several tributaries join the river upstream.
  • The map marks a small tributary stream.
  • Pollution entered the main channel through a tributary.

Forms

tributary · tributaries

Similar words

stream
Stream is a general flowing body of water; tributary identifies its relationship to a larger stream it joins.
distributary
A distributary branches away from a river; a tributary flows into one.