lagoon
/ləˈguːn/noun
1- a stretch of salt water separated from the sea by a low sandbank or coral reef（由沙坝、珊瑚礁与海隔开的）潟湖。
1.1
- the enclosed water of an atoll环礁潟湖。
1.2
- N. Amer. & Austral./NZ a small freshwater lake near a larger lake or river〈北美, 澳/新西兰〉（大湖或河边的）小淡水湖。
1.3
- an artificial pool for the treatment of effluent or to accommodate an overspill from surface drains during heavy rain废水处理池; （大雨时用的）积水池。
派生词
lagoonal
adjective词源
early 17th cent.: from Italian and Spanish laguna, from Latin lacuna （see LACUNA）.