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mainstem
This term describes the central axis of a system, whether biological, hydrological, or industrial. It carries a connotation of structural primacy and stability, serving as the essential conduit that supports all secondary branches or tributaries. In botanical contexts, it refers to the primary vertical growth, while in logistics and geography, it emphasizes the high-capacity core of a network.
As a noun, it follows standard English countability rules. While it often refers to a single specific entity (like the mainstem of a particular river), it can be used in the plural when discussing multiple systems or different types of primary conduits across various networks.
Meanings
Examples
Carefully prune the side shoots to strengthen the mainstem.
I wonder if the mainstem of this plant can support such heavy blooms.
Pollutants from the tributaries eventually flow into the mainstem of the river.
The barge navigated slowly down the mainstem toward the coast.
Water levels in the mainstem have risen significantly after the storm.
The express train stays on the mainstem to avoid local stops.
We need to upgrade the mainstem of the rail network to increase capacity.