parenthetical
pa-ren-thet-i-cal
adjective
Relating to or placed within parentheses; serving as an explanatory or qualifying aside.
"Her parenthetical comment clarified the point."
noun
A word, phrase, or sentence inserted as an explanatory or qualifying aside.
"He added a parenthetical to his speech."
Thesaurus
Synonyms: parenthetical expression, incident, parenthetic, incidental