geologic

American

[jee-uh-loj-ik] / ˌdʒi əˈlɒdʒ ɪk /

Also geological

adjective

of, relating to, or based on geology.

Other Word Forms

geologically adverb
nongeologic adjective
nongeological adjective
nongeologically adverb
pregeological adjective
ungeological adjective
ungeologically adverb

Etymology

Origin of geologic

First recorded in 1790–1800; geolog(y) + -ic

Explanation

Anything that's geologic has something to do with the structure of the Earth and the way it has changed over time. Scientists who study geologic features — including rocks in the earth's crust, volcanoes, sandy beaches, and all the other non-living things that make up our planet — are called geologists. If you're interested in geologic formations like the long, pointy mineral deposits that grow in caves, stalagmites and stalactites, you might consider a geologic career path too! Geologic is from geology and its Greek roots geo, "earth," and -logia, "a science."

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Vocabulary lists containing geologic

Earth Science - Middle School

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Earth Science - High School

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geo

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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.

The rapid drawdown caused damage to the geologic sites around the Gulf Coast where the oil is stored.

From The Wall Street Journal • Mar. 9, 2026

Much of that growth came from unconventional drilling, including hydraulic fracturing and horizontal drilling from geologic formations such as shale rock.

From MarketWatch • Feb. 16, 2026

The region has long been prized by chemical companies for its geologic features.

From Barron's • Nov. 7, 2025

"And it matches really well with what we see in the geologic record, where volcanic rocks get younger or older in a sequence that reflects this step-by-step tearing."

From Science Daily • Oct. 25, 2025

Summers he worked for scientists conducting geologic research in Antarctica or escorted climbers into New Zealand’s Southern Alps.

From "Into Thin Air" by Jon Krakauer

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023