Hi,

speaking about North American English, what are the
terms that are usually used along with parenthesis or parentheses? I'll give you some examples so you'll be able to better understand what I mean:
- Usual name of ( and ). ( Is it open/close parenthesis? I wonder why close and not closed...)
- What to say when you want somebody to write a parentheses, for example while you are dictating something.
- Is it possible to use the verb to open and to close with parenthesis? Example: "You forgot to close the last parenthesis" or "The teacher said to open a parenthesis before the word 'example'".
- Is "to open a parenthesis" an idiomatic expression? (like "I'd like to open a parenthesis about this issue...")
Thank you in advance.