Mainstem
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 The principal watercourse of a river that has multiple streams
"Piramutaba (Brachyplatystoma vaillantii) make up a second large export fishery and are found almost exclusively in the Amazon River mainstem, whitewater tributaries, and the estuary [30 –32 ]."
Synonyms
All synonymsAntonyms
All antonymsExample
More examples"Piramutaba (Brachyplatystoma vaillantii) make up a second large export fishery and are found almost exclusively in the Amazon River mainstem, whitewater tributaries, and the estuary [30 –32 ]."
Etymology
From main + stem.