Definitions

1. adjective

relating to or affecting the deep ocean

“The bathysophic creatures were found at a depth of over a mile in the dark, icy waters.”

2. noun

a person or thing that is bathysophic

“The deep-sea explorer was known as a skilled bathysophic.”

3. noun

the state or quality of being bathysophic

“The bathysophic of the ocean floor was a sight to behold.”