One sentence runs on for nearly two pages; other sentences meander through the potholes of so many parenthetical expressions as to make it nearly impossible to follow the trail of the argument … James Q. Wilson
In a construction of this sort, the phrase "the coach said" should be regarded as a parenthetical insert and should be implicitly thought of as flanked by commas. Samuel R. Levin
… his travel diaries were notable for their erratic punctuation, parenthetic embellishments and an extraordinary way with adjectives. William Dalrymple
a foreign word followed by a parenthetical translation
The recuperating Yankees have a parenthetical medical problem that is now part of each player's name: Hernández (elbow), Pettitte (elbow), Rivera (ankle), Mendoza (shoulder), O'Neill (foot), Justice (groin), Jeter (hamstring), Knoblauch (elbow). Put them together and it spells Yankees (problems). Dave Anderson
2
: containing parentheses: using or given to using parentheses
"They are a good nucleus of ideas for me," she says, adding, almost parenthetically, "Of course you have to know a lot about medicine to understand them." Publishers Weekly