Designating a region of the open water of seas and oceans which is at great depth but away from the sea floor; (of an organism) living in such a region.
Origin
Mid 19th century. From post-classical Latin abyssusabyss + -o- + pelagic.
Definition of abyssopelagic in US English:
abyssopelagic
adjectiveəˌbɪsə(ʊ)pɪˈladʒɪk
Ecology
Designating a region of the open water of seas and oceans which is at great depth but away from the sea floor; (of an organism) living in such a region.
Origin
Mid 19th century. From post-classical Latin abyssus abyss + -o- + pelagic.