Also known as: est.
EST has various meanings in the Study category. Discover the full forms, definitions, and usage contexts of EST in Study.
A bay that formed when a broad river valley was submerged by rising sea level or a sinking coast. Regions of interaction between rivers and near-shore ocean waters, where tidal action and river flow create a mixing of fresh and salt water. A drowned river mouth from an older coastline appears as a long arm of ocean water extending inland from the coast.
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