Definition of “geology” - English Dictionary

(Definition of “geology” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“geology” in American English

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geologynoun [ U ]

us /dʒiˈɑl·ə·dʒi/

earth science the study of the rocks and physical processes of the earth in order to understand its origin and history

geological
adjective [ not gradable ] us /ˌdʒi·əˈlɑdʒ·ɪ·kəl/ also geologic, us /ˌdʒi·əˈlɑdʒ·ɪk/

a geological survey

(Definition of “geology” from the Cambridge Academic Content Dictionary © Cambridge University Press)