noun

estuary

estuary, river mouth, inlet

Many birds live in the salt marshes of the estuary.

Many birds live in the salt marshes of the estuary.

The town is situated on the Thames estuary.

The town is situated on the Thames estuary.

the ((river name)) estuary the estuary of a specific river We sailed on the Exe estuary.

Synonyms: river mouth, firth, inlet; Antonyms: source (of a river)

From Latin 'aestuarium' meaning 'tidal part of a shore', which comes from 'aestus' meaning 'tide'.

Picture where a river meets the 'tide' ('aestus') of the sea.

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