bathyal

adjective

bathy·​al ˈba-thē-əl 

: of or relating to the ocean depths or floor usually from 600 to 6000 feet (180 to 1800 meters)

Examples of bathyal in a Sentence

Recent Examples on the Web

The blue of the bathyal zone bleeds into the black of the abyssal, the light winks out to perfect pitch, and the dark goes on and on, for eight monotonous hours. —Bucky McMahon, Esquire, 14 Sep. 2015

Word History

Etymology

Greek bathýs "deep" + -al entry 1 — more at bathy-

First Known Use

1907, in the meaning defined above