- 回水湖， 回水池
a stagnant pool of water in the bed of a stream that flows intermittently
a branch of a river made by water flowing from the main stream only when the water level is high
After all fish died, the pond left a pool of billabong.
Down came a jumbuck to drink beside the billabong.
And their ghosts may be heard as you march by the billabong,