Re: good name for characters matching [^\0-\377]?

I should have added that in my presentation I am attempting to present
Perl strings from a character set agnostic perspective. So, even
though there is a strong bias for Perl to treat character ordinals >
255 as Unicode code-points, I don't want people to automatically think
Unicode when encountering one of these "non-legacy characters".

I'm just wondering if there is an established term. Perhaps
"extended/large character ordinal"? It would help as in the sentence:
"If your string contains a ___, Perl will assume your string
represents Unicode code-points."

ER