estuary
//ˈɛstʃuˌɛri//
Noun
estuarySingular
estuariesPlural
1
The wide part of a river where it meets the sea, where freshwater and saltwater mix.
The estuary is home to many species of fish and birds.

The wide part of a river where it meets the sea, where freshwater and saltwater mix.
The estuary is home to many species of fish and birds.