Mainstem
Encyclopedia
Mainstem may refer to:
- Mainstem (hydrology)Mainstem (hydrology)In relation to hydrology, a main stem is "the primary downstream segment of a river, as contrasted to its tributaries". Another common term for the main stem, the final large channel of a riverine system, is the trunk. Water enters the main stem from the river's drainage basin, the land area...
is the principal watercourse in a riverine drainage system with multiple named streams. - Mainstem bronchus is a medical term for a part of the respiratory system.