pediatrics
From Longman Dictionary of Contemporary Englishpediatricspe‧di‧at‧rics /ˌpiːdiˈætrɪks/ noun [uncountable] the American spelling of paediatricsExamples from the Corpuspediatrics• Maria resigned from her oncology position and took a residency in pediatrics.• So did Cara, who has just started her medical residency in pediatrics at Harvard Medical School.