Undersea
/ˌʌndəˈrsi/
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Definition
(adj) Existing, relating to, or made for use beneath the sea.
Sentence Examples
A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions.
The bathysphere is a new technology for undersea travel.
CEFR Practice Quiz
The scientists used a small robotic submarine to explore the ____ mountain range and find any new species of life today.