geologic

US: /ˌdʒiəˈlɑdʒɪk/ ,( jē′ə loj′ik)

WordReference Random House Unabridged Dictionary of American English © 2025

ge•o•log•ic  ( jē′ə loj′ik), adj. 

1. Geology of, pertaining to, or based on geology.

Also, ge′o•log′i•cal. 

• geolog(y) + -ic 1790–1800

ge′o•log′i•cal•ly, adv. 

WordReference Random House Learner's Dictionary of American English © 2025

ge•ol•o•gy /dʒiˈɑlədʒi/   n., pl. -gies. 

1. Geology [uncountable] the science that deals with the physical history of the earth, the rocks of which it is made up, and the physical, chemical, and biological changes that the earth has undergone or is undergoing.
2. Geology the geologic features and processes occurring in a given region:
   [countable] the geology of the Andes.
3. [countable; usually singular] the study of the rocks and other physical features of a moon or another planet.

ge•o•log•ic /ˌdʒiəˈlɑdʒɪk/  ge•o•log•i•cal, adj. 
ge•o•log•i•cal•ly, adv. 
ge•ol•o•gist, n. [countable] See -geo-.

WordReference Random House Unabridged Dictionary of American English © 2025

ge•ol•o•gy  ( jē ol′ə jē), n., pl. -gies. 

1. Geology the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is undergoing.
2. Geology the study of this science.
3. Geology the geologic features and processes occurring in a given region on the earth or on a celestial body:
   the geology of Mars; the geology of eastern Kentucky.

• geo- + -logy 1680–90

Collins Concise English Dictionary © HarperCollins Publishers::

geology / dʒɪˈɒlədʒɪ/ noun

1. the scientific study of the origin, history, structure, and composition of the earth
2. the geological features of a district or country

geological / ˌdʒɪəˈlɒdʒɪk^əl/, ˌgeoˈlogic adjective

ˌgeoˈlogically adverb

geˈologist, geˈologer noun