Musicians, of course, are very familiar with segno.

Slight tangent here:

There's a terrific website that has a huge collection of signs and symbols. Curiously, segno is not included although some musical signs appear on the list. The site is one that would offer hours of exploration if one were so inclined. I'll paste it below so you can take a look at it:



http://www.symbols.com/index/wordindex-a.html