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Hadal zone
Noun
Word Frequency:
0.9
Definitions
1.
Noun
The deepest region of the ocean, lying within oceanic trenches.
Synonyms
bathyal zone
mariana trench
challenger deep
emden deep
tonga trench
kermadec trench
demersal zone
philippine trench
porcupine seabight
abyssal plain
southern ocean
mississippi canyon
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