Relating to or characteristic of an estuary, the widening mouth of a river where it meets the ocean and tides influence it.
From 'estuary' plus '-ial' (adjective suffix). 'Estuary' comes from Latin 'aestuarium' (tidal inlet), from 'aestus' (tide).
Estuarial zones are where fresh and salt water meet and mix, creating some of Earth's most productive ecosystems—more life per square foot than rainforests, yet they're some of our most endangered habitats.
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