Dictionary
ge•o•phys•ics
Pronunciation: ( jē"ō-fiz'iks), [key]—
n. (used with a sing. v.)
the branch of geology that deals with the physics of the earth and its atmosphere, including oceanography, seismology, volcanology, and geomagnetism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.