noun, plural es·tu·ar·ies.
Origin of estuary
Examples from the Web for estuarial
Historical Examples of estuarial
The bulk of estuarial silt comes down the main river from the upper Basin.The Nation's River
United States Department of the Interior
noun plural -aries
Word Origin for estuary
1530s, from Latin aestuarium "a tidal marsh or opening," from aestus "boiling (of the sea), tide, heat," from PIE *aidh- "to burn" (see edifice). Related: Estuaries; estuarine.
A wide body of water formed where a large river meets the sea. It contains both fresh and salt water.