palaeomagnetismPronunciation: /ˌpalɪə(ʊ)ˈmagnɪtɪz(ə)m, ˌpeɪ-/ (US paleomagnetism)Definition of palaeomagnetism noun [mass noun] the branch of geophysics concerned with the magnetism in rocks that was induced by the earth’s magnetic field at the time of their formation. Derivatives palaeomagneticPronunciation: /-magˈnɛtɪk/ adjective palaeomagnetism in other Oxford dictionaries Definition of palaeomagnetism in the US English dictionary