abyssal hill

noun

Definition of 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

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First Known Use of abyssal hill

1960, in the meaning defined above

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The first known use of abyssal hill was in 1960

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Cite this Entry

“Abyssal hill.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/abyssal%20hill. Accessed 12 Aug. 2020.

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