The word "parenthetical" refers to something that is added or mentioned as extra information within a sentence, often within parentheses, to provide additional details or clarification. Full definition
On 458 occasions, the two houses» transcripts record some variant of «laughter» in parenthetical asides following a member's comments. (politico.com)
Here is his list with parenthetical comments from this career coach. (selfgrowth.com)
In other words, every time you use someone else's words or ideas, you must correctly use parenthetical citations and reference the source. (custom-essay-writing-service.org)