round bracket
noun /ˈraʊnd brækɪt/
  /ˈraʊnd brækɪt/
 (also bracket)
 (both British English) (North American English or formal parenthesis)
 [usually plural]- either of a pair of marks, ( ), placed around extra information in a piece of writing or part of a problem in mathematicsTopics Languagec1, Maths and measurementc1