You searched for: “abyss
Strictly speaking, the abyss is a particular zone extending between 3,000 and 6,000 meters (9,843 feet to 19,685 feet) in depth.

By extension, the term is also used to designate the deep oceans overall.

This entry is located in the following unit: Ocean and Deep Sea Terms (page 1)
(the study of the deep seas or oceans involves the abyss or the "deep seas" which cover almost two-thirds of the earth's surface; showing applicable scientific terminology in this unit)
Word Entries containing the term: “abyss
abysso-, abyss-, abys-
Greek > Latin: Greek [abussoz], a-, "no" + bussos, "bottom" through Latin [abyssus], "no bottom, bottomless"; in this unit.