What does HADAL mean?

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Adjective

Definitions

• Of or relating to the greatest ocean depths, below approximately 20,000 feet (6,000 meters) and characterized by very high pressure, low temperature, and total darkness.
• Belonging to the abyssal zone.

Pronunciations

• US: /ˈheɪdəl/
• UK: /ˈheɪdəl/

Origin and Usage

The word "hadal" comes from the Greek word "hades," which means "the underworld." It was first used in the early 1900s to describe the deepest parts of the ocean, which were previously unknown and unexplored. Today, the term "hadal zone" is used to refer to the deepest parts of the ocean, which are more than 6,000 meters below the surface.

Synonyms

• Deep-sea
• Abyssal

Related Words

• Depth
• Ocean
• Zone

Example Sentences

• The hadal zone is the least explored part of the ocean.
• The hadal fauna is adapted to the extreme conditions of the deep sea.