After all, the POSIX standard includes slash as a name for the character, and that an ISO standard: https://pubs.opengroup.org/onlinepubs/9699919799/ What's more, Unicode refers to "\" as "backslash".
Very weird.
Apparently Unicode has renamed it be "REVERSE SOLIDUS" while still tolerating "BACKSLASH" as a name for it.
I don't expect anyone to ever use the words "REVERSE SOLIDUS" in my presence.
Interesting, it entered computer use in the era of Algol so they could write their /\ and \/ operators.
I'd be happy if nobody ever referred to the word "backslash."
I heard it read in a URL in a TV commercial this week. I can't believe it. People have been getting that wrong since AOL days.
Yes, there are people who get things wrong on the internet. Just gently correct them and move on. I don't think trying to change to other terms like solidus and reverse solidis are going to make it any better.
And I like :// being in URLs. It makes them incredibly easy to disambiguate them from anything else.