abyssal

/uh-bis-uhl/US // əˈbɪs əl //UK // (əˈbɪsəl) //

深海,深海的,深渊,深海里的

Definitions

adj.形容词 adjective

1
- : of or like an abyss; immeasurable; unfathomable.
- : Oceanography. of or relating to the biogeographic zone of the ocean bottom between the bathyal and hadal zones: from depths of approximately 13,000 to 21,000 feet.

adj.unfathomable

Synonyms

Though surveys are difficult to conduct at the depths where they live and much of the abyssal plains have not been explored, we do know that xenophyophore meadows may cover large areas and that they inhabit the Atlantic and Pacific oceans.
They are the summits of very lofty mountains which have their bases in an abyssal ocean.
Verily, wheresoever it is, it is in the Abyssal World, where there is neither end nor limit.
Oceanic islands are those, usually very small, found in the midst of the ocean, with abyssal depth all about.
The zonarial Radiolaria live floating at various depths between the pelagic and abyssal species ( 234).
It must be remembered that abyssal faunas are almost unknown among fossils.