parentheses; round brackets
Refers specifically to round brackets ( ). The cross-reference to 丸括弧 confirms this. Not used for square brackets or other bracket types.
See also: 丸括弧
この部分をパーレンで囲んでください。
Please enclose this part in parentheses.
I put the technical term in parentheses and added an explanation.
文の終わりでパーレンを閉じるのを忘れないように。
Don't forget to close the parenthesis at the end of the sentence.
I wrote the additional explanation inside the parentheses.
Loanword from English 'parentheses', borrowed into Japanese as パーレン.