thalweg or talweg /tälˈveg, -vāhh/ (geology)

1. The longitudinal profile of the bottom of a river bed
2. The middle of a main navigable waterway, acting as a boundary between states

• cotton gins
• cotton grass
• cotton grasses
• cottoning
• cotton mill
• cotton mills
• cottonmouth
• cottonmouths
• cottonocracies
• cottonocracy
• cotton on
• cotton on to
• cotton-picking
• cotton plant
• cotton plants
• cotton press
• cotton presses
• cottons
• cotton sedge
• cottonseed
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• cotton spinner
• cotton spinners
• cotton stainer
• cotton stainers