pediatrician Syllabification: (pe·di·a·tri·cian)Pronunciation: /ˌpēdēəˈtriSHən/ (Britishpaediatrician)Translate pediatrician | into French | into German | into Italian | into Spanish Definition of pediatrician noun a medical practitioner specializing in children and their diseases. pediatrician in other Oxford dictionaries Definition of pediatrician in the British & World English dictionary