abyssal

1. a. Belonging to, or resembling, an abyss; unfathomable. Source: opted

2. adj. relating to ocean depths from 2000 to 5000 meters Source: wordnet

3. adj. resembling an abyss in depth; so deep as to be unmeasurable Source: wordnet

4. Belonging to, or resembling, an abyss; unfathomable. Abyssal zone (Phys. Geog.), one of the belts or zones into which Sir E. Forbes divides the bottom of the sea in describing its plants, animals, etc. It is the one furthest from the shore, embracing all beyond one hundred fathoms deep. Hence, abyssal animals, plants, etc. Source: webster

5. Belonging to, or resembling, an abyss; unfathomable. Abyssalzone (Phys. Geog.), one of the belts or zones into which Sir E.Forbes divides the bottom of the sea in describing its plants,animals, etc. It is the one furthest from the shore, embracing allbeyond one hundred fathoms deep. Hence, abyssal animals, plants, etc. Source: adambom

6. a. relating to ocean depths from 2000 to 5000 meters Source: ecdict

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