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

• ferro-manganese
• ferro-molybdenum
• ferro-nickel
• ferronière
• ferronières
• ferronnière
• ferronnières
• ferro-print
• ferro-prints
• ferroprussiate
• ferroprussiate print
• ferroprussiates
• ferrosoferric
• ferrotype
• ferrotypes
• ferrous
• ferrous sulphate
• ferrugineous
• ferruginous
• ferruginous duck
• ferruginous ducks
• ferrugo
• ferrugos
• ferrule
• ferrules