You searched for: “abyssal plains
abyssal plains (pl) (noun)
Flat, sediment-covered areas in the deep ocean basin, usually at depths between 3,000 and 5,000 meters: Several sunken ships have been mired in the abyssal plains of the Atlantic Ocean.
This entry is located in the following units: abysso-, abyss-, abys- (page 1) -al; -ial, -eal (page 4)