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or geological

[jee-uh-loj-ik or jee-uh-loj-i-kuh l] /ˌdʒi əˈlɒdʒ ɪk or ˌdʒi əˈlɒdʒ ɪ kəl/
of, relating to, or based on geology.
Origin of geologic
First recorded in 1790-1800; geolog(y) + -ic
Related forms
geologically, adverb
nongeologic, adjective
nongeological, adjective
nongeologically, adverb
pregeological, adjective
ungeological, adjective
ungeologically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for geological
Contemporary Examples
Historical Examples
  • Not till the third day commence the first geological operations.

  • The “Alps of India” are not without this geological peculiarity.

    The Plant Hunters Mayne Reid
  • "Yes, some of the geological Survey maps," said Ernest, opening up a chart case.

    The Forbidden Trail Honor Willsie
  • It was a geological book, containing an account of the boulders.

    What the Moon Saw: and Other Tales Hans Christian Andersen
  • In that case we are commanded to work six periods and rest on the seventh, and each period must cover a geological epoch.

    Bible Romances George W. Foote
Word Origin and History for geological

1795, from geology + -ical. Related: Geologically.



1799, from geology + -ic. Geologic time is recorded from 1861.

Online Etymology Dictionary, © 2010 Douglas Harper
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