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estuary

estuary

13 4.7
The wide lower part of a river where it meets the sea and fresh and salt water mix
  • noun
  • /ˈɛstjuːˌɛri/
translation icon : estuario
  • The Amazon River has one of the largest estuaries in the world, where freshwater meets the ocean.
  • coastal estuaries
  • river estuary
  • tidal estuaries

They know about tides and estuaries and brackish water versus freshwater.

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Examples

Synonyms

firth
vsestuary
  • UK
1 9.9

A long narrow part of the sea that goes into the land

is a wider river mouth where fresh and salt water mix

How Salty

sea
1.0
estuary
13 4.7
river
1.0

Surface Forms

estuary singular
estuaries plural

Etymology

The word estuary comes from the Latin root aestus, meaning 'tide' or 'surge', and came into English through Old French. So an estuary is the place where a river meets the sea and the tides push in, mixing salt water with fresh water, which explains why estuaries are wide and always changing.