geological

adjective

geo·​log·​i·​cal ˌjē-ə-ˈlä-ji-kəl How to pronounce geological (audio)
variants or less commonly geologic
: of, relating to, or based on geology
geologically adverb

Examples of geological in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
But the moon’s geological makeup gives moonquakes a surprising persistence compared with earthquakes; the tremors can last for several hours. Robin George Andrews, Scientific American, 19 May 2026 Role of erosion Scientists now believe that the geological forces that shaped Europe’s most majestic mountain ranges are hiding a vast, untapped treasury of hydrogen. Mrigakshi Dixit, Interesting Engineering, 18 May 2026 Clay fragments sit in geological layers beneath a chunk of glass, which true to its name looks, lit from behind, like lava. Anthony Paletta, Curbed, 17 May 2026 The recent images also reveal layers of Mars' complex geological past across the region, suggesting Shalbatana Vallis may once have been even deeper before gradually filling in with sediments, ash and other material over time. Samantha Mathewson, Space.com, 15 May 2026 Along a cliff's edge in the Buffalo Gap National Grassland, boondockers have expansive views of the geological magnificence. Robert Annis, Midwest Living, 14 May 2026 Devils Tower, Wyoming — The buzz started in a hay meadow at the foot of a mysterious-looking geological formation. Marnie Hunter, CNN Money, 14 May 2026 Carrowmore/Achill Island Leaving Donegal, the road south traces the coast toward County Sligo, where the table-flat summit of Benbulben rises above farms and fields like a geological stage set. David Dickstein, Oc Register, 13 May 2026 This task involves using the drill on its robotic arm to grind a section of the geological formation, which then offers scientists back on Earth the materials necessary to analyze its composition. Andrew Paul, Popular Science, 13 May 2026

Word History

Etymology

see geology

First Known Use

circa 1723, in the meaning defined above

Time Traveler
The first known use of geological was circa 1723

Browse Nearby Words

Cite this Entry

“Geological.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geological. Accessed 21 May. 2026.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster