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abyssal plain

noun

Definition of abyssal plain

: any of the great flat sediment-covered areas of ocean floor — see continental shelf illustration

Examples of abyssal plain in a Sentence

Recent Examples on the Web

 One of the first dots in question was the unusual location of the 1969 earthquake's epicenter: a featureless expanse known as the Horseshoe abyssal plain. — National Geographic, "A tectonic plate may have peeled apart—and that could shrink the Atlantic Ocean," 6 May 2019

First Known Use of abyssal plain

1880, in the meaning defined above

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