abyssal
- a relating to ocean depths from 2000 to 5000 meters
- s resembling an abyss in depth; so deep as to be unmeasurable
the abyssal depths of the ocean
- To prove this theory the Columbia scientists took cores of the material that forms the abyssal plains.
- There is an abyssal rift here under western Iowa, unseen.
- Mining companies know how to sweep minerals off the cold, abyssal plains 20,000 ft.