estuary(redirected from Estury)
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estuarythe point at which a river meets the sea. There is thus a mixture of saline and freshwater conditions, often with areas of tidal mudflats and salt marsh. Because of the varying salinity and tidal cover there is often a specific flora and fauna associated with such areas.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005