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anchialine

adjective an·chia·line \ ˈaŋ-kē-ə-ˌlīn , -lən \
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Definition of anchialine

: having an underground connection to a larger tidal body (such as the sea) but no surface connection
  • anchialine pools
  • Located on an island in The Abacos, the fauna in this seawater-flooded anchialine cave is among the richest and most diverse in the world.
  • —Seed,  June/July 2006

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Origin and Etymology of anchialine

Greek anchíalos “near the sea, sea-girt” (from anchí “near” + -alos, derivative of háls “sea”) +1-ine

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