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es·tu·a·rine | \ ˈes-chə-(wə-)ˌrīn 
, -ˌrēn, -ˌrin, ˈesh- \
, -ˌrēn, -ˌrin, ˈesh- \Definition of estuarine
: of, relating to, or formed in an estuary estuarine currents estuarine animals
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The first known use of estuarine was in 1846
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