[umvi]

Huh, today I learned "parenthesis" are called "round brackets" in UK

[mhh__]

I have never ever heard anyone call them that in the UK, they're either brackets or parenthesis to anyone I've ever spoken to - from scientists, to builders, my grandparents all said brackets (Including the one is almost illiterate)

I'm sure someone must use it but it's not at all common

[mst]

I picked up "round brackets", "square brackets", "curly brackets" somewhere during my (Lancashire) youth though generally I only use them now when I encounter somebody confused by parens/brackets/braces as terminology.

[mhh__]

I say square and curly, but not round - I'm from Devon, but I'm only 19, so I haven't got the accent.

[efdee]

Coincidentally the Dutch word(s) for "brackets" translates to "square parenthesis".

[sedatk]

In Turkish, brackets are called "parentheses with corners".

[dmux]

Is the term "parenthetical" not common in the UK?

[mhh__]

The alternative would be bracketed, I suppose, so it is common.

[cannam]

Wouldn't it just be "in brackets"?

I used to hear that quite often - not so much in recent years, if I think about it, but that may be by chance. I think it is what I would say.