paediatrics
noun /ˌpiːdiˈætrɪks/
  /ˌpiːdiˈætrɪks/
(British English) (North American English pediatrics)
 [uncountable]- the branch of medicine that deals with children and their diseases儿科学 词源late 19th cent.: from paedo- ‘of children’ + Greek iatros ‘physician’ + -ics.