deep-sea
Americanadjective
noun
Etymology
Origin of deep-sea
First recorded in 1620–30
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“I’ve always been fascinated by deep-sea animals,” Pereira said.
From Los Angeles Times ● Sep. 5, 2026
In recent weeks though the ocean around Okinawa has been mercifully cooled by typhoons scooping up deep-sea water as they tear across the Pacific.
From Barron's ● Jul. 29, 2026
The data included carbon isotope records, measurements of phosphorus accumulation in deep-sea sediments, and a newer iodine-to-calcium method for reconstructing ancient ocean oxygen levels.
From Science Daily ● Jul. 16, 2026
Conservationists say this and other extraordinary deep-sea snails, limpets, mussels and clams could be threatened by plans to mine valuable minerals from the deep seabed.
From BBC ● Jul. 9, 2026
“Today is truly a momentous day,” the captain tells us, “for we shall test the diving bell and see if Caden’s knowledge of deep-sea exploration rings true.”
From "Challenger Deep" by Neal Shusterman
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
