estuary
ES-choo-air-ee
/ˈes.tʃu.ɛri/
The tidal mouth of a large river, where the tide meets the stream and fresh water mixes with salt water.
Refers specifically to the geographic region and coastal body of water affected by tidal fluxes.
The story behind the word. Derived from Latin aestuarium, meaning tidal inlet or creek, which traces back to aestus, meaning the boiling surge of sea tides.
Word relationships
- inlet: An inlet is any narrow strip of water entering land, while an estuary specifically requires a river mixing with oceanic tide.
Commonly confused with
- delta: A delta is a landform formed by sediment deposited at a river mouth; an estuary is the body of water where tides meet fresh water.
Word family
- estuarine (adjective): Relating to or formed in an estuary.
Collocations
- coastal estuary
- estuary mouth
- river estuary
- estuary ecosystem
Example sentences
- "The Chesapeake Bay is the largest estuary in the continental United States, supporting hundreds of species." Geography
Memory hook
ESTUARY: Where the river meets the SEA-uary. Tidal mouth where river meets ocean.
When not to use
Do not use for inland river lakes that have no connection to oceanic tides.
Fun facts
- Estuaries are known as the 'nurseries of the sea' because so many species lay eggs and raise young in their sheltered waters.
Take your vocabulary further with LangBlitz
Our English vocabulary app: FSRS spaced repetition, 5,000+ curated words across 119 topic groups, CEFR A1 to C2. Explore your mastery with the beautiful Vocabulary World feature.