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

• courbed
• courbette
• courbettes
• courbing
• courbs
• courd
• coure
• coureur de bois
• coureurs de bois
• courgette
• courgettes
• courier
• couriered
• couriering
• couriers
• courlan
• courlans
• course
• coursebook
• coursebooks
• coursed
• course of events
• course of nature
• courser
• coursers