河か跡せき湖こ

noun

oxbow lake; crescentic lake; billabong

A crescent-shaped lake formed when a meander of a river is cut off from the main channel. The term 'billabong' is specific to Australian English.

• 河か跡せき湖こは、川かわの流ながれが変かわった後あとに残のこる三み日か月づき形がたの湖みずうみです。