MEANING
Relating to ocean depths below about 6,000 meters, especially the deepest ocean trenches.
Use it for
describing the deepest ocean trenches; locating life below the usual abyssal zone; giving a deep-sea setting a precise depth categorySpecifies the deepest ocean trenches rather than merely calling water deep or abyssal. Writing functions: Deepest ocean zone.
Words that belong together
- the hadal zone
- hadal depths
- hadal organisms
On the page
The probe descended into hadal depths before its lights revealed the trench floor.
The team designed a sampler for hadal sediments.
Word forms
- Base
- hadal
Usage notes
Non-gradable adjective; use hadal zone, hadal depths, or hadal organisms. Register: technical. Commonness: uncommon outside deep-sea science (dictionary-informed qualitative editorial estimate; not a measured frequency).
Practice this word in a sentenceYour margin notes
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