subaqueous

/sʌbˈeɪkwiəs/
adjective
  1. Existing, formed, or taking place underwater.
    • The ancient city's subaqueous ruins were discovered by a team of marine archaeologists.
    • The research team studied subaqueous plants that grow at the bottom of the lake.
    • Subaqueous welding requires special equipment to protect the diver from electric shock.
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