ox·bow 
(ŏksbō′)
(ŏksbō′)n.
1. A U-shaped piece of wood that fits under and around the neck of an ox, with its upper ends attached to the bar of the yoke.
2.
a. A U-shaped bend in a river.
b. The land within such a bend of a river.
oxbow′ adj.
oxbowthe Norman River
Queensland, Australia