geophysicist

UK: /ˌdʒiːəʊˈfɪzɪsɪst/ US: /ˌdʒioʊˈfɪzəsɪst/

WordReference Random House Learner's Dictionary of American English © 2026

ge•o•phys•ics /ˌdʒioʊˈfɪzɪks/   n. [uncountable; used with a singular verb]

1. Geology, Physics the branch of geology that deals with the physics of the earth and its atmosphere, including the study of oceans, earthquakes, volcanos, and the earth's magnetic field.

ge•o•phys•i•cal, adj. 
ge•o•phys•i•cist /ˌdʒioʊˈfɪzəsɪst/  n. [countable] See -phys-.

WordReference Random House Unabridged Dictionary of American English © 2026

ge•o•phys•ics  ( jē′ō fiz′iks), n. (used with a sing. v.)

1. Geology, Physics the branch of geology that deals with the physics of the earth and its atmosphere, including oceanography, seismology, volcanology, and geomagnetism.

• geo- + physics 1885–90

ge′o•phys′i•cal, adj. 
ge′o•phys′i•cal•ly, adv. 
ge′o•phys′i•cist, n.