cardiology Syllabification: (car·di·ol·o·gy)Pronunciation: /ˌkärdēˈäləjē/Translate cardiology | into Italian Definition of cardiology noun the branch of medicine that deals with diseases and abnormalities of the heart. Derivatives cardiologicalPronunciation: /ˌkärdēəˈläjikəl/ adjective cardiologistPronunciation: /-jist/ noun cardiology in other Oxford dictionaries Definition of cardiology in the British & World English dictionary