petrophysics Syllabification: (pet·ro·phys·ics)Pronunciation: /ˌpetrōˈfiziks/Definition of petrophysics noun [treated as singular] the branch of geology concerned with the physical properties and behavior of rocks. Derivatives petrophysicalPronunciation: /-ˈfizikəl/ adjective petrophysicistPronunciation: /-ˈfizəsist/ noun petrophysics in other Oxford dictionaries Definition of petrophysics in the British & World English dictionary