deep-sea

[deep-see]

adjective

1. of, pertaining to, in, or associated with the deeper parts of the sea.

   deep-sea fishing; deep-sea diver.

deep-sea

noun

1. (modifier) of, found in, or characteristic of the deep parts of the sea

   deep-sea fishing

Word History and Origins

Origin of deep-sea¹

First recorded in 1620–30

Example Sentences

Every year, they generate more than 1.5 billion tonnes of calcium carbonate, capturing carbon dioxide from the atmosphere and storing it in deep-sea sediments.

Read more on Science Daily

The deep-sea is still largely unexplored and biodiversity surveys of these habitats are vital to increase our understanding of the incredible marine life that dwells in the depths of our oceans.

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Also unsatisfying are some purely plot-driven scenes, such as a sequence in which Joe rescues the artist Salvador Dalí from a deep-sea diver costume.

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An 11-member team of professional deep-sea divers with closed-circuit equipment conducted the recovery, organised by British historian Simon Mills, founder of the Britannic Foundation.

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"By strategically creating and exploiting regulatory confusion and oversight challenges, OceanGate was ultimately able to operate Titan completely outside of the established deep-sea protocols," it added.

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Related Words

• aquatic 
• coastal 
• maritime 
• naval 
• saltwater 
• seagoing