abyssal hill
: any of the numerous relatively low elevations arising from the ocean floor
Low abyssal hills (less than 1 kilometer above the surrounding ocean bottom) cover about 80% of the Pacific floor and about half of the Atlantic.— M. Grant Gross, Oceanography 5th Edition, 1990 — compare abyssal plain, seamount First Known Use of abyssal hill
1960, in the meaning defined above
Dictionary Entries near abyssal hill