abyssal plain(redirected from Abysssal Plain)
Also found in: Dictionary.
abyssal plain:see oceanocean,
interconnected mass of saltwater covering 70.78% of the surface of the earth, often called the world ocean. It is subdivided into four (or five) major units that are separated from each other in most cases by the continental masses. See also oceanography.
..... Click the link for more information. .
abyssal plain[ə′bis·əl ′plān]
A flat, almost level area occupying the deepest parts of many of the ocean basins.