terrestrial

adjective

ter·​res·​tri·​al tə-ˈre-st(r)ē-əl How to pronounce terrestrial (audio)
-ˈres-chəl,
-ˈresh- How to pronounce terrestrial (audio)
1
a
: of or relating to the earth or its inhabitants
terrestrial magnetism
b
: mundane in scope or character : prosaic
2
a
: of or relating to land as distinct from air or water
terrestrial transportation
b(1)
: living on or in or growing from land
terrestrial plants
terrestrial birds
(2)
: of or relating to terrestrial organisms
terrestrial habits
3
: belonging to the class of planets that are like the earth (as in density and silicate composition)
the terrestrial planets Mercury, Venus, and Mars
terrestrial noun
terrestrially adverb

Did you know?

Terrestrial might be a pretty down-to-earth word, but some of its relatives are out of this world. "Terrestrial" first appeared in English in the 15th century and derives from the Latin root terra, which means "earth." In the mid-1800s "extra-" was added to "terrestrial," giving us "extraterrestrial," an adjective that can be used to describe things (including science fiction creatures) that come from space. "Terrestrial" shares the "-al" suffix with "celestial," which was first used in the 14th century. Not surprisingly, "celestial" ("of or relating to the sky or visible heavens") traces back to the Latin for sky, "caelum."

Examples of terrestrial in a Sentence

The toad has terrestrial habits, spending most of its time on shore. scientists haven't even found all the terrestrial life on our planet
Recent Examples on the Web Based on morphology and the location it was found in, the researchers believe the monstrous snake was either terrestrial or semi-aquatic–living in marsh or coastal swamp. Lauren Leffer, Popular Science, 18 Apr. 2024 Yet like her film’s moody and mercurial tour guide, Rohrwacher is focused on a less terrestrial, more celestial world that lies just beyond our sight line. David Fear, Rolling Stone, 30 Mar. 2024 That maxim was upended last year, according to Johnny Chiang, a SiriusXM vice president of music programming who previously spent 20 years programing terrestrial country radio. Travis M. Andrews, Washington Post, 28 Mar. 2024 This phenomenon is primarily observed in marine animals but can also occur in some terrestrial and freshwater species. Scott Travers, Forbes, 29 Feb. 2024 No one knows when the first terrestrial globe was created. Laurie Kellman, Quartz, 7 Apr. 2024 Numerous findings from the terrestrial sites further suggest the species established in North America as early as 1731. Lauren Leffer, Popular Science, 3 Apr. 2024 Mammals are not solely terrestrial; some are fully aquatic, including whales and dolphins, the University of Michigan Museum of Zoology reports. Olivia Munson, USA TODAY, 1 Apr. 2024 Share [Findings] Inland waters are emitting previously unaccounted-for levels of carbon dioxide, and freshwater insects are flourishing even as terrestrial insects are dying off. Rafil Kroll-Zaidi, Harper's Magazine, 27 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'terrestrial.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Middle English, from Latin terrestris, from terra earth — more at terrace entry 1

First Known Use

15th century, in the meaning defined at sense 1a

Time Traveler
The first known use of terrestrial was in the 15th century

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Dictionary Entries Near terrestrial

Cite this Entry

“Terrestrial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/terrestrial. Accessed 23 Apr. 2024.

Kids Definition

terrestrial

adjective
ter·​res·​tri·​al tə-ˈres-trē-əl How to pronounce terrestrial (audio) -ˈres-chəl How to pronounce terrestrial (audio)
-ˈresh-chəl
1
: of or relating to the earth or its living things
2
a
: of or relating to land as distinct from air or water
terrestrial transportation
b
: living on or in or growing from land
terrestrial plants
terrestrial birds

More from Merriam-Webster on terrestrial

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