Billabong

In Australian English, a billabong (/ˈbɪləbɒŋ/ BIL-ə-bong) is a small body of water, usually permanent. It is usually an oxbow lake, caused by a change in course by a river channel; but other types of small lakes, ponds, or waterholes are also called billabongs. The term is likely a borrowing from Wiradjuri, an Aboriginal Australian language of New South Wales.